Abstract: Disclosed is a process photometer arrangement (10) with a photometric cuvette unit (20) comprising a cuvette body (24) defining a cuvette cavity (25) and a combined sample inlet/outlet opening (34), a photometer light inlet window (60) and a photometer light outlet window (62). The cuvette body (24) is movably supported by a cuvette body support element (88) and the cuvette unit (20) is provided with a cuvette vibration device (80) for vibrating the cuvette body (24) to thereby quickly and homogenously mix a liquid sample volume (31) within the cuvette cavity (25) without any separate mixing element within the cuvette cavity. This allows a short mixing action within a microfluidic cuvette.

Abstract: A method for the determination of a plausibility of a measurement result of a determination of an ammonium content of an aqueous sample. The method includes providing a blue indole dye mixture of the aqueous sample, determining a first extinction value of the blue indole dye mixture in a first absorption region, determining a second extinction value of the blue indole dye mixture in a second absorption region, dividing the first extinction value by the second extinction value so as to obtain a quotient, and determining the measurement result to not be plausible if the quotient ? 1.1.

Abstract: The invention refers to an optical measurement apparatus (10) with an optical device (18,20,22) and a liquid sample vessel (12) for measuring an optical parameter of a liquid sample (13) in the liquid sample vessel (12), comprising a drying circuit circulating drying air for venting the sample vessel (12), wherein the drying circuit comprises a mechanical water stop means (100) in the course of the drying circuit, the water stop means (100) comprising a conduit body (102) with a water-absorbing swelling element (120) arranged within the conduit body (102). The water stop means is simple and inexpensive and reliably protects all elements downstream of the water stop means from a water ingress upstream of the water stop means.

Abstract: The invention refers to a microfluidic process water analyzer (10) comprising an analyzer sample inlet (52), an optical sensor unit (40) for determination of an optical parameter of a liquid sample, a reagent tank (20; 201, 202, 203) being arranged fluidically upstream of the optical sensor unit (40) and comprising a liquid reagent (21), a waste tank (30; 301, 302, 303) arranged fluidically downstream of the optical sensor unit (40), an evaporation arrangement (32) comprising an evaporation chamber (33) arranged fluidically downstream of the optical sensor unit (40), the evaporation chamber (33) being actively vented with a drying gas pumped from a gas source (60) to the evaporation chamber (33). The evaporation arrangement allows to significantly reduce the volume of waste liquid.

Abstract: A nephelometric turbidimeter for measuring a turbidity of a liquid sample in a transparent sample cuvette. The nephelometric turbidimeter includes a cuvette chamber housing with a cuvette chamber having the transparent sample cuvette arranged therein, and a drying apparatus. The drying apparatus includes a cuvette chamber inlet opening which vents the cuvette chamber, a cuvette chamber outlet opening which de-vents the cuvette chamber, an air circulator which circulates air from the cuvette chamber outlet opening to the cuvette chamber inlet opening, and a drying body. The drying body is provided as a container of a hygroscopic agent defined by a drying substance which is arranged in a drying path between the cuvette chamber outlet opening and the cuvette chamber inlet opening so that air flows through the drying body.

Abstract: A test element for a mobile water analyzing system includes a sample line and a key reagent disposed in the sample line. The sample line includes an inlet opening arranged at a first end, a pump port arranged at a second end of the sample line, an inlet section arranged between the inlet opening and the pump port, and a measuring section with at least one window arranged at an end of the measuring section. The inlet opening receives a water sample. The measuring section is arranged between the inlet section and the pump port and is coincident with a sample pathway.

Abstract: The invention refers to a microfluidic process water analyzer (10) comprising an analyzer sample inlet (52), an optical sensor unit (40) for determination of an optical parameter of a liquid sample, a reagent tank (20; 201, 202, 203) being arranged fluidically upstream of the optical sensor unit (40) and comprising a liquid reagent (21), a waste tank (30; 301, 302, 303) arranged fluidically downstream of the optical sensor unit (40), an evaporation arrangement (32) comprising an evaporation chamber (33) arranged fluidically downstream of the optical sensor unit (40), the evaporation chamber (33) being actively vented with a drying gas pumped from a gas source (60) to the evaporation chamber (33). The evaporation arrangement allows to significantly reduce the volume of waste liquid.

Abstract: A basic unit for a mobile water analyzing system includes a photometer comprising a light source configured to generate a measurement beam and a light detector configured to receive the measurement beam, a test element receptacle configured to allow a test element to be inserted therein, and a photometric measuring track arranged between the light source and the light detector. The measurement beam is coincident with the photometric measuring track during a photometric measurement, and not in a cross direction thereto.

Abstract: A nephelometric turbidimeter for measuring a turbidity of a liquid sample in a transparent sample cuvette. The nephelometric turbidimeter includes a cuvette chamber housing with a cuvette chamber having the transparent sample cuvette arranged therein, and a drying apparatus. The drying apparatus includes a cuvette chamber inlet opening which vents the cuvette chamber, a cuvette chamber outlet opening which de-vents the cuvette chamber, an air circulator which circulates air from the cuvette chamber outlet opening to the cuvette chamber inlet opening, and a drying body. The drying body is provided as a container of a hygroscopic agent defined by a drying substance which is arranged in a drying path between the cuvette chamber outlet opening and the cuvette chamber inlet opening so that air flows through the drying body.

Abstract: Described is a lab-on-a-chip device and a method of employing a lab-on-a-chip device for determining the concentration of species present in the water.

Abstract: A method for determining an analyte of a liquid sample in a cuvette includes providing a cuvette, a reagent, a barcode, an icon on the cuvette and a liquid analysis device comprising a photometer, a rotation device, a camera, a calibration data memory storing first calibration data, and an input device which manually inputs second calibration data. The cuvette is inserted into the liquid analysis device and is rotated to align the icon with the camera. The icon is read with the camera and the icon read compared with an icon model stored in the liquid analysis device to determine whether it corresponds thereto. The liquid sample is subjected to photometry based on the first calibration data if the icon read corresponds to the icon model. If not, the input apparatus is activated and the liquid sample is subjected to photometry on the basis of the second calibration data.

Abstract: A liquid analysis system for a photometric determination of an analyte in a liquid sample includes an analyzer comprising a photometer, an RFID parameter reading device and an identifier reading device, and a cuvette package comprising an RFID parameter transponder and a plurality of test cuvettes of one batch. Each test cuvette comprises a reagent. Batch identification and batch-specific reagent data are stored in the RFID parameter transponder. Each test cuvette comprises a batch-specific identifier including a batch identification. The batch identification is configured to be read by the identifier reading device.

Abstract: A test element for a mobile water analyzing system includes a sample line and a key reagent disposed in the sample line. The sample line includes an inlet opening arranged at a first end, a pump port arranged at a second end of the sample line, an inlet section arranged between the inlet opening and the pump port, and a measuring section with at least one window arranged at an end of the measuring section. The inlet opening receives a water sample. The measuring section is arranged between the inlet section and the pump port and is coincident with a sample pathway.

Abstract: A basic unit for a mobile water analyzing system includes a photometer, a test element receptacle, a photometric measuring track, and a pump actuator. The photometer comprises a light source configured to generate a measurement beam and a light detector configured to receive the measurement beam. The test element receptacle is configured so as to allow a separate test element comprising a measuring section and a pump port to be inserted into the test element receptacle. The photometric measuring track is defined by the measuring section when the separate test element is inserted into the test element receptacle. The measurement beam and the photometric measuring track are aligned during a photometric measurement so that a photometric measurement occurs along a longitudinal length of each of the photometric measuring track and the measuring section. The pump actuator is cooperatively connected with the pump port.

Abstract: Described is a lab-on-a-chip device and a method of employing a lab-on-a-chip device for determining the concentration of species present in the water.

Abstract: Described is a lab-on-a-chip device and a method employing a lab-on-a-chip device for determining the concentration of species present in water.

Abstract: A basic unit for a mobile water analyzing system includes a photometer comprising a light source configured to generate a measurement beam and a light detector configured to receive the measurement beam, a test element receptacle configured to allow a test element to be inserted therein, and a photometric measuring track arranged between the light source and the light detector. The measurement beam is coincident with the photometric measuring track during a photometric measurement, and not in a cross direction thereto.

Abstract: A method for determining an analyte in a water sample with a mobile water analyzing system having a basic unit and a test element insertable in the basic unit, the method comprising providing the test element and the basic unit. The test element is inserted into a test element receptacle of the basic unit. The water sample is transported forward from an inlet opening to a measuring section of the test element. A first analyzing of the water sample is performed in the measuring section with an analyzer of the basic unit. The water sample is transported forward from the measuring section to the first reagent section of the test element. The water sample is transported backward from the first reagent section to the measuring section of the test element. A second analyzing of the water sample is performed in the measuring section with the analyzer of the basic unit.

Abstract: A mobile water analyzing system for determining an analyte in a water sample includes a basic unit and a test element configured to be inserted into the basic unit. The test element includes a sample line with an inlet opening configured to receive the water sample, a measuring section forming a measuring track and configured to allow the determination of an analyte, a pump opening, and a key reagent disposed inside the sample line. The basic unit includes a test element receptacle configured to hold the inserted test element, an analyzer with an analyzer measuring track formed by the measuring section, and a pump actuator cooperatively connected with the pump opening.