In An Aqueous Solution (e.g., Toc, Etc.) Patents (Class 436/146)
  • Patent number: 10073073
    Abstract: An apparatus for determining the content of at least one oxidizable constituent of an aqueous, liquid sample, comprising a high temperature reactor for decomposing the liquid sample and forming a gaseous mixture, which contains at least the constituent as a gaseous oxide, wherein the high temperature reactor has a liquid inlet for delivery of the liquid sample and a gas inlet for delivery of a carrier gas, and is connected via a gas discharge with an analysis chamber, wherein a condensing unit is placed in front of the analysis chamber for condensing water from the gas mixture, wherein, during operation of the apparatus, a gas stream of the carrier gas with the gas mixture of the high temperature reactor passes via the gas discharge and the condensing unit into the analysis chamber, and wherein, between the gas discharge and the condensing unit, a heatable filter unit is interposed for removal of salts and/or metal oxides from the gas mixture, and the gas discharge, the filter unit and optionally connecting e
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: September 11, 2018
    Assignee: Endress+Hauser Conducta GmbH+Co. KG
    Inventors: Oliver Bettmann, Ulrich Kathe
  • Patent number: 9194850
    Abstract: A first flow rate adjustment mechanism (18) and a second flow rate adjustment mechanism (28) are controlled by a flow rate control unit (62) so that a carrier gas flows through a first supply path (56) and a second supply flow rate (57) at a predetermined flow rate. The flow rate control unit (62) includes cell flow rate control means (66) for controlling the first flow rate adjustment mechanism (56) and the second flow rate adjustment mechanism (57) so that the flow rate of the carrier gas introduced into a sample cell (44) in a sparging state, which is a state where the carrier gas is supplied from the first supply path (56) into a syringe pump (4), and the flow rate of the carrier gas introduced into the sample cell (44) in a normal state.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: November 24, 2015
    Assignee: SHIMADZU CORPORATION
    Inventors: Shinsuke Inoue, Kiyuki Noto
  • Patent number: 9040306
    Abstract: The present invention relates to a high-temperature furnace for T(O)C measurement of a sample, which has a furnace housing which bounds a vaporization space and has a sample opening for the dropwise introduction of the sample and at least one flushing opening for introduction of a flushing liquid. According to the invention, the furnace housing is lined with a spinel ceramic on an inner side facing the vaporization space. By means of the spinel ceramic, the vaporization space is lined with a material which allows particularly high temperatures within the vaporization space and thus very complete combustion and is at the same time very resistant to temperature changes. This allows cleaning with a flushing liquid at essentially the operating temperature of the vaporization space and removal of deposited salts, in particular recrystallized organic salts, from the vaporization space in the flushing liquid in dissolved or undissolved form.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: May 26, 2015
    Assignee: LANXESS Deutschland GmbH
    Inventors: Christian Heuckeroth, Rudolf Kreutzer, Peter Kawulycz
  • Publication number: 20150111304
    Abstract: Methods for measuring total organic carbon in a water sample and total carbon in a water sample are disclosed.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 23, 2015
    Inventors: Richard E. Leggett, John Lee, Vishnu V. Rajasekharan
  • Patent number: 8932873
    Abstract: A method for monitoring the concentration of water borne substances in an aqueous medium, by introducing a defined amount of the aqueous medium into a gas circulatory system of an analytical apparatus which extends through a high temperature reaction chamber and a measuring chamber. The introducing of the aqueous medium occurs upstream of the high temperature reaction chamber or into it. The aqueous medium is evaporated in the high temperature reaction chamber, the water borne substance with at least one reaction partner in the high temperature reaction chamber reacts to a gaseous reaction product, and a current value of a measured variable is registered, which is a function of the concentration of the chemical species of the reaction product in the gas circulatory system.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: January 13, 2015
    Assignee: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mBH + Co. KG
    Inventors: Ulrich Kathe, Thomas Schipolowski, Oliver Bettmann, Björn Emling
  • Patent number: 8932862
    Abstract: A method of determining the solubility of a compound in a selected solvent is provided that does not require determination of, or use of, standards having known concentrations of the compound. In one aspect, the method can include preparation of a mixture where not all of a compound is dissolved in the provided solvent, separating undissolved compound from the solvent, and direct determination of the amount of the compound dissolved in the solvent. Methods adapted for use include those where a multiplicity of compounds or solvents are tested in parallel. Devices adapted for these methods are also provided by the present disclosure.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: January 13, 2015
    Assignee: Analiza, Inc.
    Inventors: Arnon Chait, Boris Y. Zaslavsky
  • Patent number: 8785207
    Abstract: The present invention relates generally a method and apparatus for measuring multiple parameters in-situ in a sample collected from an environmental system via a single device. In one embodiment, the method includes collecting the sample from said environmental system via the single device, measuring a first parameter of the sample in-situ via the single device, adding a reagent tot the sample within the single device to create a reagent infused sample and measuring a second parameter of the sample in-situ via the single device using the reagent infused sample.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: July 22, 2014
    Assignee: SRI International
    Inventors: Ryan J. Bell, R. Timothy Short, Strawn K. Toler, Robert H. Byrne
  • Patent number: 8650935
    Abstract: A method of determining the TOC of a purified water stream is disclosed comprising at least the steps of: passing a supply water stream through a water purification apparatus including an oxidizer to provide a purified water stream, and dispensing at least a portion of the purified water stream; stopping the dispense of the purified water stream and recirculating the purified water stream as a recirculating water stream through at least a portion of the water purification apparatus including the oxidizer to provide a re-oxidized water stream; and measuring the conductivity value of the re-oxidized water stream to determine the TOC of the purified water stream. In this way, a determination of the TOC of the purified water stream of can be provided without requiring a dedicated TOC monitor at the point of dispense of the purified water stream.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: February 18, 2014
    Assignee: VWS (UK) Limited
    Inventors: Lee Underwood, Paul Whitehead
  • Patent number: 8652409
    Abstract: Fluid analyte sensors include a photoelectrocatalytic element that is configured to be exposed to the fluid, if present, and to respond to photoelectrocatalysis of at least one analyte in the fluid that occurs in response to impingement of optical radiation upon the photoelectrocatalytic element. A semiconductor light emitting source is also provided that is configured to impinge the optical radiation upon the photoelectrocatalytic element. Related solid state devices and sensing methods are also described.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: February 18, 2014
    Assignee: Valencell, Inc.
    Inventors: Steven Francis LeBoeuf, Jesse Berkley Tucker, Michael Edward Aumer
  • Publication number: 20140038304
    Abstract: The present invention relates to a high-temperature furnace for T(O)C measurement of a sample, which has a furnace housing which bounds a vaporization space and has a sample opening for the dropwise introduction of the sample and at least one flushing opening for introduction of a flushing liquid. According to the invention, the furnace housing is lined with a spinel ceramic on an inner side facing the vaporization space. By means of the spinel ceramic, the vaporization space is lined with a material which allows particularly high temperatures within the vaporization space and thus very complete combustion and is at the same time very resistant to temperature changes. This allows cleaning with a flushing liquid at essentially the operating temperature of the vaporization space and removal of deposited salts, in particular recrystallized organic salts, from the vaporization space in the flushing liquid in dissolved or undissolved form.
    Type: Application
    Filed: October 11, 2013
    Publication date: February 6, 2014
    Applicant: LANXESS Deutschland GmbH
    Inventors: Christian HEUCKEROTH, Rudolf KREUTZER, Peter KAWULYCZ
  • Publication number: 20140030814
    Abstract: A total organic carbon measuring device comprises: a sample supply unit that collects and supplies sample water; an oxidative decomposition unit that is connected to the sample supply unit and oxidizes organic matter contained in the sample water supplied from the sample supply unit to carbon dioxide; a carbon dioxide separation unit that transfers carbon dioxide from the sample water that has passed through the oxidative decomposition unit to measurement water consisting of deionized water; a conductivity measuring unit that measures the conductivity of the measurement water flowing from the carbon dioxide separation unit; and an arithmetic processing unit that calculates the TOC concentration of the sample water from a measured value obtained by the conductivity measuring unit.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: SHIMADZU CORPORATION
    Inventor: Masahito Yahata
  • Patent number: 8557597
    Abstract: A total organic carbon measuring instrument including a measuring unit composed of, integrated together, organic substance oxidation part and carbon dioxide separation part and conductivity measuring part, control unit and data processing unit. In order to enhance the accuracy of conductivity measurement, the control unit is constructed so as to stop feeding of a sample water at the time of oxidation of organic substance and carry out feeding of the sample water at the time of sample water moving to the organic substance oxidation decomposition part and carbon dioxide separation part. The data processing unit is constructed so as to measure the total organic carbon concentration on the basis of conductivity at the time of arriving of sample water irradiated with ultraviolet rays of which relative intensity is a given value or higher at the carbon dioxide separation part.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: October 15, 2013
    Assignee: Shimadzu Corporation
    Inventors: Masakazu Akechi, Hirohisa Abe, Yoichi Fujiyama
  • Patent number: 8491858
    Abstract: In some embodiments, the invention provides systems and methods for removing carbon dioxide and/or additional components of waste gas streams, comprising contacting the waste gas stream with an aqueous solution, removing carbon dioxide and/or additional components from the waste gas stream, and containing the carbon dioxide and/or additional components, in one form or another, in a composition. In some embodiments, the composition is a precipitation material comprising carbonates, bicarbonates, or carbonates and bicarbonates. In some embodiments, the composition further comprises carbonate and/or bicarbonate co-products resulting from co-processing SOx, NOx, particulate matter, and/or certain metals. Additional waste streams such as liquid, solid, or multiphasic waste streams may be processed as well.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: July 23, 2013
    Assignee: Calera Corporation
    Inventors: William Randall Seeker, Brent Constantz, Vinod Khosla
  • Patent number: 8420013
    Abstract: Pure water is sucked from an acid adding flow line into a syringe and discharged from a drain flow line to clean the acid adding flow line, and then a carrier gas from a gas pipe is supplied to the acid adding flow line by the syringe to dry the acid adding flow line. A sample water collecting flow line is also cleaned and dried in the same manner. A TOC measurement flow line is cleaned with cleaning water sucked from a cleaning water flow line into the syringe, then a carrier gas from the gas pipe is supplied to the TOC measurement flow line by the syringe to clean and dry a flow line through which sample water flows in an organic matter oxidative decomposition unit from the TOC measurement flow line.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 16, 2013
    Assignee: Shimadzu Corporation
    Inventor: Shinsuke Inoue
  • Publication number: 20130045540
    Abstract: An aspect provides an analyzer for validating a measurement of total organic carbon in a sample of water, including: one or more processors; and a memory storing program instructions including: instructions for measuring an amount of total organic carbon in a first sample of water using and obtaining a first measurement thereof; instructions for identifying a potential excursion event when an amount of total organic carbon in the first sample is above a predefined threshold; instructions for capturing a second sample of water in a bottle responsive to detecting the potential excursion event; instructions for introducing the second sample into a the analyzer; instructions for measuring an amount of total organic carbon in the second sample using the analyzer and obtaining a second measurement thereof; and instructions for comparing the first measurement and second measurement. Other aspects are described and claimed.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 21, 2013
    Applicant: Hach Company
    Inventors: Matthew Grant Collier, Robert Lee Garvin, Terry Gene Stange
  • Patent number: 8377694
    Abstract: A method for the calibration of a device for measuring the total organic carbon content (TOC) of an aqueous solution by measuring resistivity. The method includes the following steps, in the presence of a reference TOC analyzer: (a) producing a calibration point by a measurement carried out on ultrapure water by the device and the analyzer; (b) producing a plurality of calibration points, each calibration point corresponding to a measurement of the resistivity of a solution having a given content of photo-oxidizable compound, by the device and the analyzer, in order to establish a correlation between the values measured by the device and the analyzer; and (c) calibrating the device by at least one algorithm, based on the measurements carried out in the previous step.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: February 19, 2013
    Assignee: EMD Millipore Corporation
    Inventors: Pascal Rajagopalan, Celine Le Ninivin-Glipa, Antony Vanheghe
  • Patent number: 8323982
    Abstract: Fluid analyte sensors include a photoelectrocatalytic element that is configured to be exposed to the fluid, if present, and to respond to photoelectrocatalysis of at least one analyte in the fluid that occurs in response to impingement of optical radiation upon the photoelectrocatalytic element. A semiconductor light emitting source is also provided that is configured to impinge the optical radiation upon the photoelectrocatalytic element. Related solid state devices and sensing methods are also described.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: December 4, 2012
    Assignee: Valencell, Inc.
    Inventors: Steven Francis LeBoeuf, Jesse Berkley Tucker, Michael Edward Aumer
  • Publication number: 20120107947
    Abstract: A total organic carbon measuring instrument including a measuring unit composed of, integrated together, organic substance oxidation part and carbon dioxide separation part and conductivity measuring part, control unit and data processing unit. In order to enhance the accuracy of conductivity measurement, the control unit is constructed so as to stop feeding of a sample water at the time of oxidation of organic substance and carry out feeding of the sample water at the time of sample water moving to the organic substance oxidation decomposition part and carbon dioxide separation part. The data processing unit is constructed so as to measure the total organic carbon concentration on the basis of conductivity at the time of arriving of sample water irradiated with ultraviolet rays of which relative intensity is a given value or higher at the carbon dioxide separation part.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 3, 2012
    Inventors: Masakazu Akechi, Hirohisa Abe, Yoichi Fujiyama
  • Patent number: 8114676
    Abstract: Apparatus and methods for measuring the concentrations of organic and inorganic carbon, or of other materials, in aqueous samples are described, together with related, specially adapted components and sub-assemblies and related control, operational and monitoring systems.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: February 14, 2012
    Assignee: GE Analytical Instruments
    Inventors: Gregory B. Conway, Michael R. Scaer, Paul Melanson, Gordon K. Francis, Pei Huang
  • Patent number: 8101418
    Abstract: Apparatus and methods for measuring the concentrations of organic and inorganic carbon, or of other materials, in aqueous samples are described, together with related, specially adapted components and sub-assemblies and related control, operational and monitoring systems.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: January 24, 2012
    Assignee: GE Analytical Instruments
    Inventors: Gregory B. Conway, Michael R. Scaer, Paul Melanson, Gordon K. Francis, Pei Huang
  • Patent number: 8101417
    Abstract: Apparatus and methods for measuring the concentrations of organic and inorganic carbon, or of other materials, in aqueous samples are described, together with related, specially adapted components and sub-assemblies and related control, operational and monitoring systems.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: January 24, 2012
    Assignee: GE Analytical Instruments
    Inventors: Gregory B. Conway, Michael R. Scaer, Paul Melanson, Gordon K. Francis, Pei Huang
  • Patent number: 8101420
    Abstract: Apparatus and methods for measuring the concentrations of organic and inorganic carbon, or of other materials, in aqueous samples are described, together with related, specially adapted components and sub-assemblies and related control, operational and monitoring systems.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: January 24, 2012
    Assignee: GE Analytical Instruments
    Inventors: Gregory B. Conway, Michael R. Scaer, Paul Melanson, Gordon K. Francis, Pei Huang
  • Patent number: 8101419
    Abstract: Apparatus and methods for measuring the concentrations of organic and inorganic carbon, or of other materials, in aqueous samples are described, together with related, specially adapted components and sub-assemblies and related control, operational and monitoring systems.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: January 24, 2012
    Assignee: GE Analytical Instruments
    Inventors: Gregory B. Conway, Michael R. Scaer, Paul Melanson, Gordon K. Francis, Pei Huang
  • Patent number: 8039266
    Abstract: Methods to radiolabel natural organic matter by reduction with a hydrogen labeled reducing agent, and compositions, are provided.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: October 18, 2011
    Assignee: Colorado School of Mines
    Inventors: Ruth M. Tinnacher, Bruce D. Honeyman
  • Patent number: 8003048
    Abstract: An automated standards sampling apparatus (50) and method for using such, apparatus are described. The apparatus can be integrated with a liquid analyzer to form a compact, integrated liquid analysis unit. When used in combination with a specially adapted vial se of standard liquids, the apparatus provides a system for automated, substantially error-free periodic calibration and accuracy verification for an online TOC analyzer (52). The automated standards sampling apparatus of this invention facilitates the easy introduction of known concentrations of standard solutions and “grab” samples into online TOC analyzers to satisfy regulatory compliance, calibration, and validation requirements.
    Type: Grant
    Filed: September 30, 2006
    Date of Patent: August 23, 2011
    Assignee: GE Analytical Instruments
    Inventors: Brian K. Clay, Martin B. Tobias, Larry Macklin, Richard D. Godec, Steve Poirier
  • Patent number: 7993586
    Abstract: Disclosed is a total organic carbon (TOC) measurement apparatus capable of facilitating reduction in size of the apparatus and achieving enhanced measurement accuracy. The TOC measurement apparatus includes an organics oxidation unit, a carbon-dioxide separation unit and a conductivity measurement unit, which are integrally formed by laminating a plurality of plates to define therebetween and incorporate therein an oxidizing flow passage, an aqueous-sample flow passage, a gas permeable membrane, a measurement-water flow passage and a conductivity measuring electrode. The TOC measurement apparatus is designed such that carbon oxide in an aqueous sample is transferred from the aqueous-sample flow passage to the measurement-water flow passage through the gas permeable membrane, and a conductivity of measurement water which contains the carbon oxide and flows through a flow passage facing the conductivity measuring electrode is determined and converted to a TOC content.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: August 9, 2011
    Assignee: Shimadzu Corporation
    Inventors: Yoichi Fujiyama, Masakazu Akechi, Masaki Kanai
  • Patent number: 7931865
    Abstract: An apparatus which comprises: an organic-substance oxidation part in which organic substances contained in a sample water supplied are oxidized into carbon dioxide; a carbon dioxide separation part in which the carbon dioxide contained in the sample water is caused to permeate and come into a measurement water; and a conductivity measurement part in which the conductivity of the measurement water is measured. The carbon dioxide separation part comprises: a sample water channel in which sample water flows; an intermediate water part in which intermediate water having a higher pH value in a neutral region than the sample water is present; and a measurement water channel through which the measurement water comprising deionized water flows. The sample water channel is in contact with the intermediate water part through a gas-permeable membrane, and the intermediate water part is in contact with the measurement water channel through a gas-permeable membrane.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: April 26, 2011
    Assignee: Shimadzu Corporation
    Inventors: Yoichi Fujiyama, Hirohisa Abe, Masakazu Akechi, Takeaki Inoue, Takeshi Iharada
  • Patent number: 7803631
    Abstract: Process for determination of a water content material, in particular organic carbon content and/or nitrogen, in which an aqueous sample is evaporated and combusted in at least one heating vessel equipped with a heating facility and the combustion product is fed in a transport gas flow to a detector for determination of the concentration of a gaseous compound of the water content material, characterised in that calibration is performed with a predetermined volume of a calibration gas which contains a predetermined concentration of the element corresponding to the water content material, in particular carbon and/or nitrogen.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: September 28, 2010
    Assignee: LAR Process Analysers AG
    Inventors: Werner Arts, Berndt Martens
  • Patent number: 7759125
    Abstract: A photoelectrochemical assay apparatus and method for determining chemical oxygen demand (COD) of a water sample is described. The photoelectrochemical assay comprises: a) a measuring cell for holding a sample to be analysed b) a titanium dioxide nanoparticle photoelectric working electrode and a counter electrode disposed in said cell, c) a UV light source adapted to illuminate the photoelectric working electrode d) control means to control the illumination of the working electrode e) potential measuring means to measure the electrical potential at the working and counter electrodes f) analysis means to derive a measure of oxygen demand from the measurements made by the potential measuring means.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: July 20, 2010
    Assignee: Aqua Diagnostic Pty Ltd
    Inventor: Huijun Zhao
  • Publication number: 20100178706
    Abstract: A method for monitoring the concentration of water borne substances in an aqueous medium, by introducing a defined amount of the aqueous medium into a gas circulatory system of an analytical apparatus which extends through a high temperature reaction chamber and a measuring chamber. The introducing of the aqueous medium occurs upstream of the high temperature reaction chamber or into it. The aqueous medium is evaporated in the high temperature reaction chamber, the water borne substance with at least one reaction partner in the high temperature reaction chamber reacts to a gaseous reaction product, and a current value of a measured variable is registered, which is a function of the concentration of the chemical species of the reaction product in the gas circulatory system.
    Type: Application
    Filed: November 30, 2007
    Publication date: July 15, 2010
    Applicant: Endress + Hauser Conducta Gesellschaft fur Mess- und Regeltechnik mbh + Co. KG
    Inventors: Oliver Bettmann, Bjorn Emling, Ulrich Kathe, Thomas Schipolowski
  • Patent number: 7753618
    Abstract: Compositions comprising synthetic rock, e.g., aggregate, and methods of producing and using them are provided. The rock, e.g., aggregate, contains CO2 and/or other components of an industrial waste stream. The CO2 may be in the form of divalent cation carbonates, e.g., magnesium and calcium carbonates. Aspects of the invention include contacting a CO2 containing gaseous stream with a water to dissolve CO2, and placing the water under precipitation conditions sufficient to produce a carbonate containing precipitate product, e.g., a divalent cation carbonate.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: July 13, 2010
    Assignee: Calera Corporation
    Inventors: Brent Constantz, Andrew Youngs, James O'Neil, Kasra Farsad, Joshua Patterson, John Stagnaro, Ryan Thatcher, Chris Camire
  • Patent number: 7713479
    Abstract: A liquid analyser has a reactor portion and an associated measurement portion. A sample pump is operable to deliver a liquid sample to a reactor vessel. A base pump supplies a base solution to the reactor vessel. An ozone generator supplies ozone to the reactor vessel. The liquid sample is oxidised in the reactor vessel by means of hydroxyl radicals which are generated using the base solution and ozone to reduce complex components of the liquid sample to their lowest state in solution. The oxidised sample solution is delivered to an optical detector in the measurement portion to determine the concentration of one or more selected materials such as nitrogen, phosphorous or a heavy metal in the oxidised sample solution.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 11, 2010
    Assignee: Analytical Developments Limited
    Inventors: Martin Horan, Seamus O'Mahony
  • Patent number: 7709313
    Abstract: A method of manufacture and device for a dual-gate CMOS structure. The structure includes a first plate in an insulating layer and a second plate above the insulating layer electrically corresponding to the first plate. An isolation structure is between the first plate and the second plate.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: May 4, 2010
    Assignee: International Business Machines Corporation
    Inventors: Andres Bryant, Edward J. Nowak, Richard Q. Williams
  • Patent number: 7670843
    Abstract: A method of and device for sampling polycyclic aromatic hydrocarbons (PAHs) in the ambient environment, the method including: (a) providing a polymer film for collecting the PAHs; (b) exposing the polymer film to a gas containing the PAHs, and (c) performing an analysis of the PAHs collected by the polymer film, the analysis being selected from the group consisting of fluorescence analysis and Fourier Transform Imaging Microscopy (FT-SIM).
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: March 2, 2010
    Assignee: Technion Research and Development Foundation Ltd.
    Inventors: Israel Schechter, Chanan Sluszny, Valery Bulatov, Vladimir Gridin
  • Patent number: 7662637
    Abstract: Methods and apparatus (FIG. 4a) are disclosed for selective and very sensitive detection of certain hydrolyzable compounds, especially urea, in water by hydrolyzing said hydrolyzable compounds in a sample of the water to one or more carbon dioxide group compounds and determining the difference in the carbon dioxide content of the water and the hydrolyzed sample using conductivity measurements or other carbon dioxide detector outputs.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: February 16, 2010
    Assignee: GE Analytical Instruments
    Inventor: Richard D. Godec
  • Publication number: 20090253212
    Abstract: Prospective invention concerns to area of ecology and analytical chemistry, and also to water treatment, and can be used for estimation the effectiveness of water purification from different origin on water intakes with various stages of technological processing, for assessment of overall performance of filters and water treating devices of household and industrial purpose. The essence of technique consists in use of generalized parameter of total carbon content—technogenic organic carbon—in semi-volatile organic compounds before and after stages of water treatment. The total carbon content is determined by gas chromatography coupled with atomic-emission detection. Due to high sensitivity of method, parameter technogenic organic carbon correctly reflects changes of water quality during water treatment.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 8, 2009
    Applicant: MUP "UFAVODOKANAL"
    Inventors: Vyacheslav S. Gordienko, Lev I. Kantor, Lialia G. Tsypycheva, Margarita Yu. Vozhdaeva, Evgeniy A. Kantor, Igor A. Melnitskiy, Natalya V. Trukhanova
  • Patent number: 7598086
    Abstract: A photoelectrochemical assay apparatus for determining chemical oxygen demand (COD) of a water sample which consists of a) a measuring cell for holding a sample to be analysed b) a titanium dioxide nanoparticle photoelectric working electrode and a counter electrode disposed in said cell, c) a UV light source adapted to illuminate the photoelectric working electrode d) control means to control the illumination of the working electrode e) potential measuring means to measure the electrical potential at the working and counter electrodes f) analysis means to derive a measure of oxygen demand from the measurements made by the potential measuring means.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: October 6, 2009
    Assignee: Aqua Diagnostic Pty Ltd
    Inventor: Huijun Zhao
  • Publication number: 20090246882
    Abstract: A system for measuring dissolved organic compounds in water that engages separate conductivity and temperature sensors at various points in the water flow. In addition, a UV reaction chamber produces light that levies high-level amounts of hydroxyl radicals during the oxidation process. The flow is then diverted into various directions based upon the settings of a three-way valve that determines when the sensor readings will take place as the water flows through the UV radiation.
    Type: Application
    Filed: April 1, 2009
    Publication date: October 1, 2009
    Inventors: Rocco D. Pochy, Scott S. Salton, Thomas C. Saunders
  • Publication number: 20090124019
    Abstract: The present invention relates to the quantification of organic compounds originating from a chromatography system that does not involve the use of patterns, comprising the continuous conversion of the carbon of the compounds into carbon dioxide (CO2) involving a chemical reaction and the mixing of same, before or after separation, with a known, constant flow of a carbon compound, preferably CO2, with carbon isotope-13 (13C). The mixture is introduced into a mass spectrometer in which the isotopic ratio 12C/13C is continuously measured either in the carbon or in a characteristic ion originating from same. The isotope ratio is converted into a carbon mass flow measurement using on-line isotope dilution.
    Type: Application
    Filed: October 11, 2006
    Publication date: May 14, 2009
    Applicant: UNIVERSIDAD DE OVIEDO
    Inventors: Jorge Ruiz Encinar, Jose Ignacio Garcia Alonso
  • Publication number: 20080220533
    Abstract: Disclosed herein is a method for measuring total organic carbon without the influence of nitrogen components. The method for measuring total organic carbon includes the steps of: (1) adjusting the hydrogen ion concentration of sample water to between pH 4 and pH 6; (2) decomposing organic matter and nitrogen compounds contained in the sample water into carbon dioxide and nitrous acid, respectively, through oxidation and; (3) making the carbon dioxide permeate into measuring water via a gas-permeable part 5a; (4) and measuring the electric conductivity of the measuring water to determine the total organic carbon content of the sample water.
    Type: Application
    Filed: November 29, 2005
    Publication date: September 11, 2008
    Applicant: SHIMADZU CORPORATION
    Inventors: Yoichi Fujiyama, Yozo Morita, Isao Katasho
  • Publication number: 20080160628
    Abstract: A method for determining degradable, organic carbon comprises the following steps: the sample is fed to a combustion tube along with a carrier gas; the sample is treated with inert gas in the combustion tube at at least 850° C.; the obtained pyrolysis gas, which contains the AOC, is conducted across a metal oxide as an oxygen donor for oxidizing purposes without adding oxygen; the AOC is oxidized while the metal oxide is reduced; the AOC is measured by means of a detector while the CO2 peak is detected, the carrier gas being switched from inert gas to O2 once the CO2 peak has passed; the RC is burned in the O2 atmosphere while the metal oxide is regenerated; and the RC is measured by means of a detector.
    Type: Application
    Filed: February 27, 2006
    Publication date: July 3, 2008
    Inventors: Hans-Joachim Kupka, Ralf Dunsbach
  • Patent number: 7247498
    Abstract: Apparatus and methods for supplying a portion of a fluid stream and, alternately, a fluid of known composition and concentration to an analyzer are provided. The fluid stream is directed through a series of connected chambers formed in an integral housing. A sampling needle has an inlet in one of the chambers and an outlet in fluid communication with the analyzer. When desired, a tube or vial containing a known fluid may be inserted into a chamber containing the sampling needle, so that the known fluid will be supplied to the analyzer. A second needle provides ventilation to the vial to prevent the formation of a vacuum as the known fluid is drained from the vial.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: July 24, 2007
    Assignee: GE Analytical Instruments
    Inventors: Richard D. Godec, Frank J. Silvester, Blaine R. Bateman
  • Patent number: 7214481
    Abstract: The invention discloses methods, compositions and kits for stabilizing a solubilized phenyl phosphate, preferably paranitrophenyl phosphate (PNPP), using charcoal. Also disclosed are methods, compositions and kits for recycling solubilized phenyl phosphate, preferably PNPP, that has an absorbance of less than 0.1 when measured at 405 nm due to non-enzymatic hydrolysis.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: May 8, 2007
    Assignee: BioFX Laboratories, Inc.
    Inventor: Thomas M. Woerner
  • Patent number: 7029921
    Abstract: An apparatus for continuous on-line measurement of chemical composition of aerosol particles with a fast time resolution is provided. The apparatus includes an enhanced particle size magnifier for producing activated aerosol particles and an enhanced collection device which collects the activated aerosol particles into a liquid stream for quantitative analysis by analytical means. Methods for on-line measurement of chemical composition of aerosol particles are also provided, the method including exposing aerosol carrying sample air to hot saturated steam thereby forming activated aerosol particles; collecting the activated aerosol particles by a collection device for delivery as a jet stream onto an impaction surface; and flushing off the activated aerosol particles from the impaction surface into a liquid stream for delivery of the collected liquid stream to an analytical instrument for quantitative measurement.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: April 18, 2006
    Assignee: Brookhaven Science Associates, LLC
    Inventors: Yin-Nan E. Lee, Rodney J. Weber, Douglas Orsini
  • Patent number: 7001717
    Abstract: The invention discloses methods, compositions and kits for stabilizing a solubilized phenyl phosphate, preferably paranitrophenyl phosphate (PNPP), using charcoal. Also disclosed are methods, compositions and kits for recycling solubilized phenyl phosphate, preferably PNPP, that has an absorbance of less than 0.1 when measured at 405 nm due to non-enzymatic hydrolysis.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: February 21, 2006
    Assignee: BioFX Laboratories, Inc.
    Inventor: Thomas M. Woerner
  • Patent number: 6872291
    Abstract: The presence of biological contaminants in a liquid coating composition is determined by measuring the carbon dioxide content of the atmosphere above the liquid and comparing the measured carbon dioxide level to a baseline carbon dioxide level. A biocide can be added to the liquid when the measured carbon dioxide level reaches a predetermined value to control the level of biological contaminants in the liquid coating composition.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: March 29, 2005
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Donald W. Boyd, Steven R. Zawacky
  • Patent number: 6841390
    Abstract: A real-time system and method for measuring stickies by separating high molecular weight non-fibrous species from low molecular weight non-fibrous species and sensing the concentration of the high molecular weight species. Specifically, a fiber slurry containing stickies is filtered to remove fibers, fiber debris, and other large contaminant particles from the fiber slurry, after which the carbon content of the filtered sample is measured. Next, the filtrate is ultrafiltered to separate stickies having a high molecular weight from the filtrate, and subsequently, the carbon content of the ultrafiltered sample is measured. Finally, the carbon contents are used to determine the microstickies concentration in the fiber slurry.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: January 11, 2005
    Assignee: Georgia Tech Research Corp.
    Inventor: Sujit Banerjee
  • Patent number: 6793889
    Abstract: Total organic carbon in an aqueous or gaseous sample is measured by admitting the sample and an oxidant gas to a cell transparent to plasma, establishing a relatively low energy plasma in the cell, and measuring the CO2 thus produced using FTIR, NDIR, or conductivity-based techniques.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: September 21, 2004
    Assignee: Hach Company
    Inventors: Ulf W. Naatz, Yasuo Yamamori, John Stillian, Tsutomo Asano
  • Patent number: 6741084
    Abstract: The present invention provides a device useful in the photo-oxidation of a sample liquid and in the measurement of the oxidized carbon content thereof. The device includes a cell, at least two elongate probes, and a temperature sensitive element. The cell includes a rigid light-transmissive outer wail that encloses a continuous predetermined internal volume The elongate probes—providing collectively the ability to measure temperature and conductivity—penetrate through the rigid outer wall and extend substantially into the cell's internal volume. At least one of the elongate probes is hollow at least partially along its length, the temperature sensitive element being positioned within this bore. A methodology involving the use of the device is also described.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: May 25, 2004
    Assignee: Millipore Corporation
    Inventors: David Allen Pane, John R. Stillian, Nick R. Jancewicz, Gastón de Los Reyes, Wisam Yacteen
  • Patent number: 6737276
    Abstract: A method and an apparatus is provided for the determination of the content of organic carbon (TOC) of liquids, in particular ultra-pure water, wherein a liquid sample under investigation is located in a reaction chamber and carbon present in the liquid is statically oxidized to mainly carbon dioxide. After oxidation of the carbon, the sample quantity is transferred to a measuring cell, connected to the reaction chamber by liquid entering the reaction chamber from the outside the reaction chamber, where (i.e. in the measuring cell) the carbon concentration of the sample, which is proportional to the carbon content, is dynamically registered as the sample flows through the measuring cell.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: May 18, 2004
    Assignee: Maihak Aktiengesellschaft
    Inventors: Werner Voss, Erich Messerschmitt, Herbert Bendlin