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| Number | Title | Issue Date |
| 7977113 | Biological agent detector method A biological agent detector detects the presence of any biological agents, such as anthrax or other biological warfare agents, in a sample of air. The biological agent detector includes a bio-concentrator that concentrates an aerosol and a pyrolyzer portion includin... | 07/12/2011 |
| 7442555 | Ammonia gas sensor method and device A mixed potential sensor device and methods for measuring total ammonia (NH3) concentration in a gas is provided. The gas is first partitioned into two streams directed into two sensing chambers. Each gas stream is conditioned by a specific catalyst syste... | 10/28/2008 |
| 7297549 | Method of determining measurement bias in an emissions monitoring system A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a sample gas line of an emissions monitoring system. The method further c... | 11/20/2007 |
| 7267987 | Process and assembly for simultaneously evaluating a plurality of catalysts A process and an assembly for simultaneously evaluating a plurality of catalysts is provided wherein the flow rate of a reactive fluid to each of a plurality of reactors is automatically adjusted based on the measured amount of catalyst sample in each reactor to con... | 09/11/2007 |
| 7256044 | Elevated pressure apparatus and method for generating a plurality of isolated effluents An apparatus and a method for rapidly generating a plurality of isolated effluents have been developed. A specific embodiment involves screening a plurality of solids through simultaneously contacting the members of the plurality with a fluid, sampling the resulting... | 08/14/2007 |
| 7253005 | Catalyst sampling system A method and apparatus are provided for obtaining a reproducible sample of solid particles. The reproducible sample is obtained by receiving solid particles into a collection system that includes a sheltered volume. Solid particles that settle outside of the shelter... | 08/07/2007 |
| 7244395 | Apparatus for trace sulfur detection using UV fluorescence A method and system for performing low level sulfur UV fluorescence measures including an UV interference reduction system which removes or destroys interfering nitrogen oxides. The preferred nitrogen removal systems include introducing ozone into the system in suff... | 07/17/2007 |
| 7238847 | Apparatus and method for determining and controlling the hydrogen-to-carbon ratio of a pyrolysis product liquid fraction A process and apparatus for determining the hydrogen-to-carbon ratio of the liquid fraction of a pyrolysis product by determining the hydrogen-to-carbon ratio of the pyrolysis product gas fraction and subtracting the thus determined value from the determined hydroge... | 07/03/2007 |
| 7223607 | Process and device for the detection of hydrocarbons in a gas The invention relates to a process for the detection of hydrocarbons other than methane in a gas predominantly or essentially comprising oxygen, as well as methane and the said hydrocarbons other than methane, the said process comprising: ... | 05/29/2007 |
| 7150994 | Parallel flow process optimization reactor Parallel flow reaction systems comprising four or more reaction channels are disclosed. Distribution systems, and parallel flow reaction systems comprising such distribution systems are also disclosed. Specifically, the distribution systems comprise one or more subs... | 12/19/2006 |
| 7129092 | Apparatus and method for generating a plurality of isolated effluents An apparatus and a method for rapidly generating a plurality of isolated effluents have been developed. A specific embodiment involves screening a plurality of solids through simultaneously contacting the members of the plurality with a fluid, simultaneously samplin... | 10/31/2006 |
| 7118916 | Method of reducing analysis time of endpoint-type reaction profiles Methods, devices and kits for facilitating medical diagnostic assays and reducing the time required for taking of such assays. The methods comprise initiating a reaction, obtaining at least three measurements, at three different time points, of a value or level of a... | 10/10/2006 |
| 7029920 | Method and system for monitoring combustion source emissions A method and system for determining a concentration level of NOx in an exhaust stream from a combustion source. The method comprises capturing sample gas from the exhaust stream using a sampling device. NO2 in the sample gas is converted to NO ... | 04/18/2006 |
| 6968729 | Method and apparatus for expediting analysis of samples The present invention comprises a method for expediting the analysis of a plurality of samples, preferably using gas chromatography. A specific embodiment comprises a dual isothermal heated zone configuration for use in combinatorial chemistry. This involves partiti... | 11/29/2005 |
| 6475802 | Apparatus for and method of collecting gaseous mercury and differentiating between different mercury components A method and apparatus are provided for collecting a sample gaseous mercury, to differentiate between different gaseous mercury components. A quartz denuder module is provided having a coated extended surface for adsorbing reactive gaseous mercury. After ... | 11/05/2002 |
| 6054098 | Apparatus for measuring ozone This invention provides an apparatus for measuring ozone in which interference effects of SO2 are intended to be reduced. This invention comprises a reference gas line for generating reference gas with ozone removed by allowing the sample gas t... | 04/25/2000 |
| 5976889 | Gas analyzer and method for detecting NOx A method and apparatus for detecting NOx by chemiluminescence. The apparatus includes a sample gas line having an inlet port for receiving a sample gas, a NOx converter connected to the sample gas line, a N2 diluting gas l... | 11/02/1999 |
| 5968452 | System for controlling flow of a diluted sample and determining pollutants based on water content in engine exhaust emissions A system is provided in an exhaust emission sampling system for controlling a flow controller in order to compensate for the effects of changing water vapor content in a diluted sample having a predetermined dilution ratio. A water measuring device such a... | 10/19/1999 |
| 5958777 | Device for determining CO2 and CO in a geologic sediment A device for determining at least one petroleum characteristic of a geologic sediment sample placed in a boat, said device including a first heater heating said sample in a non-oxidizing atmosphere, a measuring component determining hydrocarbon-containing... | 09/28/1999 |
| 5942439 | Method for isotopic analysis of chlorinated organic compounds The present invention provides a method for preparing a VOC sample for carbon and chlorine isotope ratio analysis by mass spectrometer. A VOC sample is placed in a combustion tube and reacted with CuO to form CO2 and CuCl. The CO2 is... | 08/24/1999 |
| 5879948 | Determination of total mercury in exhaust gases The present invention relates to a system, apparatus, and process to reduce the oxidized mercury in an exhaust gas to elemental mercury and to prevent its reoxidation by congeneric components in the exhaust gas prior to the photometric measurement of said... | 03/09/1999 |
| 5866431 | Electrothermal atomization means for analytical spectrometry An electrically heatable hollow-body furnace with a secondary surface on which an analyte of a sample can be condensed prior to being atomized. The furnace is constructed in two sections which are capable of being electrically heated independently of one ... | 02/02/1999 |
| 5846831 | Methods and systems for controlling flow of a diluted sample and determining pollutants based on water content in engine exhaust emissions In a first embodiment of the present invention, a control method and system are provided in an exhaust emission sampling system for controlling a flow controller in order to compensate for the effects of changing water vapor content in a diluted sample ha... | 12/08/1998 |
| 5811308 | Method for determining petroleum characteristics of geologic sediments The present invention relates to a method for determining at least one petroleum characteristic of a geologic sediment sample heated in a non-oxidizing atmosphere and an oxidizing atmosphere. The sample is heated to a first temperature value below 200° C... | 09/22/1998 |
| 5798271 | Apparatus for the measurement of dissolved carbon in deionized water Apparatus and methods for the measurement of total organic carbon, total inorganic carbon, total carbon and total heteroorganic carbon of deionized water are described. In a preferred embodiment, the sample is split into a first stream and a second stream... | 08/25/1998 |
| 5786225 | Method for evaluating a pollution characteristic of a soil sample A method of evaluating at least on type of pollution characteristic in a soil sample contaminated by hydrocarbon compounds, a method wherein the soil sample is first heated in a non-oxidizing atmosphere, then in an oxidizing atmosphere. The method compris... | 07/28/1998 |
| 5766954 | Isotopic composition analyser A continuous flow method of determining the quantitative isotopic composition of hydrogen comprised in a compound is disclosed, together with apparatus for carrying out the method. The method involves introducing the sample to be analysed into a flow of c... | 06/16/1998 |
| 5739038 | Spectrometer gas analyzer system A gas analyzer system for providing a spectroscopic analysis of the sample gas. This analysis is accomplished by first introducing the sample gas into the inlet of the system and transporting it to a spectral analyzer. The sample gas is then spectrally an... | 04/14/1998 |
| 5571724 | Smog monitor The amount of smog formed in air and the smog concentration in air is determined by measuring the consumption of nitric oxide.... | 11/05/1996 |
| 5567623 | Method and system for sampling and determining the presence of compounds A system and method are provided for minimizing the effects of background signals in masking signals indicating the presence of substances to be detected such as contaminants in materials moving rapidly along a conveyor. The contaminants detected may incl... | 10/22/1996 |
| 5476795 | Method for evaluating degree of dispersion of inorganic material in composite material A method for evaluating a degree of dispersion of an inorganic material in a composite material comprising an organic material having dispersed therein the inorganic material, the method comprising the steps of: forming a block sample of the composite mat... | 12/19/1995 |
| 5470754 | Method and system for sampling and determining the presence of compounds A system and method are provided for minimizing the effects of background signals in masking signals indicating the presence of substances to be detected such as contaminants in materials moving rapidly along a conveyor. The contaminants detected may incl... | 11/28/1995 |
| 5432095 | Partial permixing in flame-ionization detection A method of detecting a concentration of contaminants in an air sample. The method includes the steps of combining a first portion of the air sample with a fuel to produce a sample/fuel mixture, igniting the sample/fuel mixture in a combustion chamber to ... | 07/11/1995 |
| 5356818 | Smog monitor The amount of smog formed in air and the smog concentration in air is determined by measuring the consumption of nitric oxide.... | 10/18/1994 |
| 5304287 | Microdistillation method A microdistillation method for the quantitative steam distillation of cyanide, phenolic compounds, hydrogen fluoride, ammonia, sulfites and other volatile analyte compounds from samples of environmental waters and sludge for their subsequent analysis invo... | 04/19/1994 |
| 5270218 | Analytical method and apparatus for analyzing substances An analytical method which comprises sampling a predetermined amount of a liquid sample, bringing the sample to a vapor-liquid equilibrium at a predetermined temperature and pressure, separating the resultant gaseous and liquid fractions from each other, ... | 12/14/1993 |
| 5268302 | Selective, high speed detection of vapors with analysis of multiple GC-separated portions A method and apparatus for selective, high speed detection of vapors of specific gas-chromatographically-separable compounds. In the disclosed method separate analyses are performed on two portions of a gas sample formed by flash-heating trapped vapors to... | 12/07/1993 |
| 5152963 | Total sulfur analyzer system operative on sulfur/nitrogen mixtures A total sulfur analyzer system is set forth. The system operates with gas, liquid or solid samples including free sulfur, and sulfur and nitrogen compounds. The sample is first combusted to provide products of combustion including SO2 and NO. T... | 10/06/1992 |
| 5106754 | Zero gravity compatible total organic and inorganic carbon analyzer Total organic carbon (TOC) and inorganic carbon (TIC) monitoring of water is useful in determining the water quality. Conventional TOC and TIC monitoring techniques are not zero gravity compatible. The addition of microporous hydrophobic bladders in combi... | 04/21/1992 |
| 5096834 | Method for determination of concentration of smoke and apparatus therefor A method for the determination of smoke concentration is disclosed which comprises heating a sample smoke containing a SOF (soluble organic fraction) component and a dry soot component to a temperature not lower than the boiling point of the SOF component... | 03/17/1992 |
