Abstract: Methods and apparatus are described for preventing nitrogen interference in the detection of a substance. In particular, it relates to new methods and apparatus for preventing interference due to nitrogen in pyro-electrochemical methods for measuring substances, for example sulfur content, contained within liquids such as petroleum products and beverages. One preferred apparatus and method comprises a catalytic converter or thermal converter to selectively remove the nitrogen-containing interferant, for example NO2, in the pyrolyzed gas stream to NO without affecting the sulfur content. A second preferred apparatus and method comprises a chemical scrubber to selectively remove the nitrogen-containing interferant from the gas stream without affecting the sulfur content.

Abstract: An improved on-stream analyzer for monitoring sulfur or nitrogen content of liquid petroleum or beverage products is described. It consists of the following main components: a sample injector for injecting predetermined fixed volumes of the liquid into a thermal oxidizer (pyrolyzer) at a preset, controlled rate, a thermal oxidizer in which an inert carrier gas and oxygen are introduced at measured and preset, controlled rates to thermally oxidize the sample at a temperature of about 1050° C., sample conditioner to control the relative humidity and temperature of the resulting gas mixture, an electrochemical cell sensitive to sulfur dioxide (SO2) or NO to measure the concentration of SO2 or NO in the gas mixture, and a programmable logic controller (PLC) to calculate the sulfur content of the original sample and manage the analyzer.

Abstract: An improved on-stream analyzer for monitoring sulfur or nitrogen content of liquid petroleum or beverage products is described. It consists of the following main components: a sample injector for injecting predetermined fixed volumes of the liquid into a thermal oxidizer (pyrolyzer) at a preset, controlled rate, a thermal oxidizer in which an inert carrier gas and oxygen are introduced at measured and preset, controlled rates to thermally oxidize the sample at a temperature of about 1050° C., sample conditioner to control the relative humidity and temperature of the resulting gas mixture, an electrochemical cell sensitive to sulfur dioxide (SO2) or NO to measure the concentration of SO2 or NO in the gas mixture, and a programmable logic controller (PLC) to calculate the sulfur content of the original sample and manage the analyzer.

Abstract: Methods and apparatus are described for preventing nitrogen interference in the detection of a substance. In particular, it relates to new methods and apparatus for preventing interference due to nitrogen in pyro-electrochemical methods for measuring substances, for example sulfur content, contained within liquids such as petroleum products and beverages. One preferred apparatus and method comprises a catalytic converter or thermal converter to selectively remove the nitrogen-containing interferant, for example NO2, in the pyrolyzed gas stream to NO without affecting the sulfur content. A second preferred apparatus and method comprises a chemical scrubber to selectively remove the nitrogen-containing interferant from the gas stream without affecting the sulfur content.

Abstract: This invention relates to the use of a class of compounds as immunopotentiaters, compositions containing such compounds and their manufacture, combinations of such compounds with anti-tumor or anti-infective drugs and the use of such combinations in the prophylaxis or treatment of such diseases arising from tumors or infections.

Abstract: A method and apparatus are disclosed for improved collection of airborne particles in an airborne prospecting method. A high volume of air is sampled and processed through a cyclone separator to achieve a high concentration of particle collection on a collecting surface. The collected particles may be analyzed as to mineral element type and correlated with the geographical position of collection to permit a deduction as to the type of minerals and soil in the terrain below.

Abstract: Method and apparatus for first converting energy pulses, such as from the energy-dispersive detector of an emission spectroscopy system, into multiple ramp signals, the ramps of which are parallel with the vertical distance between the ramps being proportional to energy pulse height. Digital samples of the ramps are taken and, from the known slope of the ramps, the vertical distance or difference may be determined using a least-squares algorithm. This value is the absolute amplitude pulse value.

Abstract: Method and apparatus for detection of mercury vapor present in environmental atmosphere for the purpose of detecting the degree of environmental mercury pollution that might be present. Environmental air is passed through a bed of fibrous material such as glass wool, the fibers of which are coated with a noble metal, such as silver, capable of extracting mercury vapor from the environmental air. The bed of fibrous material may be placed within a heating chamber where sufficient heat is applied to drive off the collected mercury and a clean and perhaps inert gasiform fluid, such as clean air, nitrogen, argon, etc. is passed through the heating chamber to serve as a carrier for mercury vapor that is driven off of the bed of fibrous material. The mercury vapor laden carrier gas is then cooled and the mercury vapor present in the gas is collected by passing the gas through a screen of nylon mesh that is also coated with the noble metal.