41
Richard D Sacks, Christine L Rankin: Thermal modulation inlet for gas chromatography system. The Regents of the University of Michigan, Harness Dickey & Pierce, August 25, 1992: US05141532 (27 worldwide citation)

A gas chromatography system which incorporates a simplified sample injection system in which replaces conventional mechanical injection systems with one based strictly upon thermal trapping of a continuously supplied carrier gas and sample stream. The carrier gas and sample stream pass continuously ...


42
David P Rounbehler, Eugenie Hainsworth, David P Lieb: Selective detection with high speed gas chromatography. Thermedics, Herbert E Messenger, May 10, 1994: US05310681 (27 worldwide citation)

A highly selective, sensitive, fast detection system and method are disclosed for detecting vapors of specific compounds in air. Vapors emanating from compounds such as explosives, or stripped from surfaces using heat and suction from a hand-held sample gun, are collected on surfaces coated with gas ...


43
W Barry Baker, Harry E Betsill: Pump unit for sampling air. E I Du Pont de Nemours and Company, Hilmar L Fricke, July 9, 1985: US04527953 (27 worldwide citation)

An improved pump unit for sampling air that operates at a constant air flow rate in the range of 5-5000 cc/min. having a filter for removing particles or vapors from the air stream, an air accumulator, a variable drive pump optionally with a bypass, an electric motor for driving the pump, an optiona ...


44
Ronald P Manginell, Gregory C Frye Mason: Temperature programmable microfabricated gas chromatography column. Sandia Corporation, Kevin W Bieg, December 23, 2003: US06666907 (27 worldwide citation)

A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating element and temperature sensing on the microfabricated column. Additionally, means are provided to thermally ...


45
Raanan A Miller, Erkinjon G Nazarov, David B Wheeler, Kenneth A Markoski: Compact gas chromatography and ion mobility based sample analysis systems, methods, and devices. Sionex Corporation, Ropes & Gray, October 27, 2009: US07608818 (26 worldwide citation)

A compact integrated ion mobility based analysis system includes at least one gas chromatograph (GC) column that receives a sample and elutes constituents of the sample where each of the eluted constituents are temporally separated from each other The system also includes at least one ion mobility b ...


46
Braman Robert S, Dynako Alexander: Method and apparatus for gas analysis utilizing a direct current discharge. IIT Research Institute, October 12, 1971: US3612686 (26 worldwide citation)

A method and apparatus for spectrochemical analysis of a gas is provided in which the subject gas is mixed with a carrier gas and introduced into an analysis space between two electrodes. A continuous direct current discharge between the electrodes is produced which sustains a plasma formed from the ...


47
Walter R Fehr, Earl G Hammond: Soybeans having low linolenic acid and elevated stearic acid contents. Iowa State University Research Foundation, Burns Doane Swecker & Mathis L, February 3, 1998: US05714668 (26 worldwide citation)

A novel soybean seed and plant capable of producing the same are provided. Such soybean seed contains an endogenous linolenic acid (C18:3) content in the vegetable oil at a low level of less than 3.0% (preferably less than about 2.5%) by weight in combination with an elevated stearic acid (C18:0) co ...


48
Stephen R Springston: Method for making a non-extractable stationary phase of polymer within a capillary column. Associated Universities, Vale P Myles, October 30, 1990: US04966785 (26 worldwide citation)

A method for coating interior capillary column surfaces, or packing material of a packed column, used for gas chromatography, with a stationary polymer phase that is cross-linked by exposing it to a low-temperature plasma that is uniformly distributed over the column or packing material for a predet ...


49
Anita J Peters, Richard D Sacks: Adsorbent trap for gas chromatography. The Regents of the University of Michigan, Harness Dickey & Pierce, February 22, 1994: US05288310 (25 worldwide citation)

A gas chromatography system in which prefocusing of a sample analyte is provided through the use of an adsorbent coated porous layer open tubular trap tube. Through the use of an adsorbent coated collection device low boiling point components can be successfully trapped for preconcentration and inje ...


50
Richard D Sacks, Anita J Peters: Mechanical gas chromatography injection valves and column multiplexing techniques. The Regents of the University of Michigan, Harness Dickey & Pierce, April 27, 1993: US05205845 (25 worldwide citation)

Several embodiments of gas chromatography systems are disclosed incorporating mechanical sample injection valves. The injection valves incorporate a delivery tube having an outlet which is swept past the inlet of a separation column to provide a short duration inlet plug into the separation column. ...



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