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Class 436/123 - Total or elemental sulfur


Subclass of Class 436 - Chemistry: analytical and immunological testing
Definition: Subject matter in which (1) the total sulfur content of
No. of patents: 58
Last issue date: 12/27/2011


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NumberTitleIssue Date
8084263Device and method for measuring elemental sulfur in gas in gas lines
A device and method for measuring the level of elemental sulfur present in a gas in a gas line. The method may include the steps of: collecting a sample of elemental sulfur-containing gas from the gas line, wherein the sample is collected on an outer surface of a pr...
12/27/2011
7427378Analysis method and apparatus for sulfur component using ultraviolet fluorescence
An analysis method and analysis apparatus involve analysis for a sulfur component using ultraviolet fluorescence capable of removing the interferential influence of NO with good efficiency and certainty to thereby measure a concentration of only sulfur components su...
09/23/2008
7255834Method and devices for improving the dynamic flash combustion reaction connected with gas chromatography for the elemental analysis of C H N S O
A method and device are provided for dynamic flash combustion reaction connected with gas chromatography for the elemental analysis of C H N S O in an automatic elemental analyzer. A combustion reactor is provided with a sampling device and an oxygen feed line. Cont...
08/14/2007
7244395Apparatus 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
7214345Apparatus for analyzing reduced inorganic sulphur
An apparatus for measuring the reduced inorganic sulfur content of a sample. The apparatus has a reaction chamber (12) and means (14) for introducing a reducing agent that can selectively convert the reduced inorganic sulfur of a sample in the reaction...
05/08/2007
7201877Device and method for detecting sulfuryl fluoride
A device for detecting sulfuryl fluoride, in which the gas specimen to be examined is subjected to pyrolysis with ensuing detection of a pyrolysis product, is to be improved for the sake of achieving a mobile, economical structure. To attain this object, in a prelim...
04/10/2007
7172730Thermal sensor
A thermal sensor has a substrate defining a reaction chamber. The reaction chamber has an inlet for conducting sample into the reaction chamber, a reaction surface and an orifice adjacent the reaction surface defining an outlet from the reaction chamber. The reactio...
02/06/2007
7141090Active filter temperature control
An emission sampling system includes an exhaust gas probe for sampling exhaust gas. A dilution gas source provides a dilution gas, and a mixing device is in fluid communication with the exhaust gas probe and the dilution gas source to mix the sampled exhaust gas and...
11/28/2006
7041794Polynucleotides and polypeptides of the erythropoietin gene
The present invention relates to new polynucleotides deriving from the nucleotide sequence of the EPO gene and comprising new SNPs, new polypeptides derived from the natural EPO protein and comprising at least one mutation caused by the SNPs of the invention as well...
05/09/2006
6932941Method and apparatus for improved gas detection
The invention relates to a method and apparatus for providing a reactor having a heater, a passage for transporting a reactant, and a chamber containing a gas sample and being coupled to the passage for receiving the reactant and mixing the reactant with the gas sam...
08/23/2005
6399391Low cost total reduced sulfur analysis system
A system and apparatus for analyzing stack gas for total reduced sulfur. The gas is withdrawn from a stack through a probe, filtered and regulated to a known temperature. The gas is then passed through a scrubbing column to remove sulfur dioxide and split...
06/04/2002
6255117Method and device for determining monopersulfate
A test method and device are described for quantitatively determining the presence and concentration of monopersulfate ion in aqueous solution. Contacting the aqueous solution containing monopersulfate ion with a test strip in accordance with the inventio...
07/03/2001
6205841Gas chromatograph
Mass flow controllers are respectively placed in the middle of a hydrogen gas tube and air tube connected to a FPD. The flow controllers are controlled to supply hydrogen and oxygen from the nozzle to achieve the optimum mixture rate of hydrogen and oxyge...
03/27/2001
6130095Method for the measurement of sulfur compounds
An improved system for the measurement of sulfur compounds is described. The system comprises an enclosed burner assembly for the conversion of sulfur-containing compounds to sulfur monoxide and subsequent detection of sulfur monoxide by ozone-induced che...
10/10/2000
6013530Process for determination of sulfur content
In a sulfur determining process, comprising a hydrocracking step of a sample in a ceramic reactor and darkness measuring step of lead acetate soaked tape by reaction of produced H2 S, an improvement is made. The improvement comprises at least o...
01/11/2000
5661036Process for the detection of sulfur
A process and apparatus are disclosed for the detection and measurement of sulfur in both organic and inorganic sulfur-containing compounds. The process includes admixing a sample including a sulfur-containing compound with oxygen, and then exposing the m...
08/26/1997
5582684Method of determining degree of reduction in a sulfate liquor using IR and UV spectroscopy
The invention relates to a method of determining the concentration of sulfide and optionally also of polysulfide in liquors and solutions of smelt deriving from the sulfate process. According to the method, the concentrations are determined by measuring t...
12/10/1996
5547876Combustion accelerators, processes for their production and processes for their use in elemental analysis
Non-toxic combustion decomposition accelerators and processes for their production for elemental analysis. The non-toxic accelerators may be either single component or multicomponent. The single component non-toxic accelerators are glass frit, niobium pen...
08/20/1996
5501981Method and apparatus for chemiluminescent detection of sulfur
An improved method and apparatus for the measurement of sulfur compounds is described. The system comprises a dual burner assembly for the conversion of sulfur-containing compounds to form sulfur monoxide and subsequent detection of sulfur monoxide by ozo...
03/26/1996
5424217Process for the detection of sulfur
A process and apparatus are disclosed for the detection and measurement of sulfur in both organic and inorganic sulfur-containing compounds. The process includes admixing a sample including a sulfur-containing compound with oxygen, and then exposing the m...
06/13/1995
5385830Apparatus for measuring free and total sulfurous acid and method of measurement
The present invention provides a method for measuring the amount of free sulfurous acid and bound sulfurous acid in a sample using a bacterium belonging to Thiobacillus thiooxidans or Thiobacillus ferrooxidans of in which the sample is treated with acid a...
01/31/1995
5338515SO2 sensor
This invention is a process for detecting low concentration levels of sulfur oxides (SO2) in a flowing gas stream (typically a combustion exhaust gas stream) and a catalytic SO2 sensor system which may be used in that process....
08/16/1994
5330714Process and apparatus for simultaneous measurement of sulfur and non-sulfur containing compounds
The present invention describes the process and apparatus for the simultaneous measurement of sulfur-containing compounds and organic compounds with or without sulfur in their structures. A detector cell is described that allows simultaneous measurement o...
07/19/1994
5310683Process for simultaneous measurement of sulfur and non-sulfur containing compounds
A process and apparatus for the simultaneous measurement of sulfur-containing compounds and organic compounds with or without sulfur in their structures. A detector cell allows simultaneous measurement of compounds that can be ionized in a flame and there...
05/10/1994
5227135Apparatus for simultaneous measurement of sulfur and non-sulfur containing compounds
The present invention describes the process and apparatus for the simultaneous measurement of sulfur-containing compounds and organic compounds with or without sulfur in their structures. A detector cell is described that allows simultaneous measurement o...
07/13/1993
5152963Total 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
5134080Fluid component detection method
A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the result...
07/28/1992
5104527Automatic total reducers monitoring and adjustment system using titration
A process and apparatus for automatically monitoring or adjusting, or both, the concentration of total reducers (i.e. reduced sulfur-containing constituents which consume iodine) in an aqueous medium (e.g. waste water stream) whereby the time period for i...
04/14/1992
5087574Fluid component detection method with feedback
A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the result...
02/11/1992
5049508Apparatus and process for total sulfur determination
The total sulfur content of samples consisting of chemical compounds is determined by the use of gas chromatographic separation of the sulfur and its flame-photometric detection. The samples are subjected to a catalytic reaction in a pipe reactor before t...
09/17/1991
5010021Method for restoring the sensing capacity of an electrical sensor
A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the result...
04/23/1991
5010022Method for determining sulfur loading in organic polysulfides
A method of determining sulfur loading of an organic polysulfide composition comprises reacting the organic polysulfide composition with an organic phosphine to produce reaction products comprising organic phosphine sulfide and an organic sulfide selected...
04/23/1991
5004696Automatic total reducers monitoring and adjustment system
A process and apparatus for automatically monitoring or adjusting, or both, the concentration of total reducers (i.e. reduced sulfur-containing constituents which consume iodine) in an aqueous medium (e.g. waste water stream) whereby the time period for i...
04/02/1991
4950456Apparatus for analysis of a sample for sulphur
Methods and apparatus are provided for decomposing and analyzing a sample for sulfur. The methods combust a nebulized sample in an oxygen-rich atmosphere and then analyze the combustion gases for sulfur. The apparatus employs a nebulizer operatively conne...
08/21/1990
4885244Method of producing hyaluronic acid
High molecular weight hyaluronic acid can be efficiently produced by incorporating one or more compounds having at least one aromatic ring to which one or more hydroxyl groups are attached into a medium for producing hyaluronic acid by a bacterium capable...
12/05/1989
4780417Rapid extraction, separation, and detection method for a separate analysis of free and total sulfites in foods by ion chromatography
A process for the rapid extraction, separation, and detection of free and total sulfites in food is disclosed. The process comprises the steps of (a) extracting sulfites from a sample in the presence of a medium having a selected pH to produce an extracta...
10/25/1988
4678756Chemiluminescent sulfur detection apparatus and method
In the illustrated and preferred embodiment of this disclosure, a chemiluminescent sulfur detector, both method and apparatus, for detecting bonded sulfur in compounds is disclosed. The illustrated and preferred embodiment, being provided with a discrete ...
07/07/1987
4526755Gas analyzer or the like
An analyzer for natural gas to determine the existence of and concentration of wanted and unwanted sulfur compounds and odorizing agents....
07/02/1985
4467038Predetector reservoir for chromatographic analysis instrument
A gas chromatographic apparatus is provided which comprises a gas chromatography column, a detector and an extended conduit between the column and the detector, the conduit providing means for flow of a gas so as to enable essentially complete elution of ...
08/21/1984
4456580Automatic apparatus for analyzing metals
An automatic apparatus for loading and feeding crucibles to and removing crucibles from a combustion furnace in which metals are burned for analyzing them. The apparatus has a part for automatically transporting crucibles to a sample weighing position one...
06/26/1984
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