Christopher H Baker

US Patent:

51232766, Jun 23, 1992

Filed:

May 8, 1991

Appl. No.:

7/696869

Inventors:

Thomas G. Hartman - Staten Island NY
John J. Manura - Pennington NJ
Santford V. Overton - Ringoes NJ
Christopher W. Baker - Lambertville NJ
John N. Manos - Trenton NJ

Assignee:

Rutgers University - New Brunswick NJ

International Classification:

G01N 3018

US Classification:

73 23410

Abstract:

An injection assembly for short path thermal desorption apparatus used in a gas chromatography-detector unit (GC-DET) for systems, methods and techniques such as a gas chromatography-mass spectrometry system. The short path thermal desorption apparatus has a housing defining an upper compartment, and a desorption compartment. The injection assembly is disposed exterior of the housing and is actuated from a disengaged position to an engaged position with the gas chromatography unit by a suitable gas powered cylinder assembly mounted in the upper compartment and includes a desorption tube for collecting and storing the sample compound to be analyzed, means for passing a carrier gas therethrough to desorb the sample component when the desorption unit is heated, and a needle injector for passing the desorbed sample component to the GC-DET system for identification and quantification of the sample component. The desorption tube is operatively associated with a desorption block assembly having a pair of coating heating blocks made of materials having a high coefficient of heat transfer and mounted for bilateral opening and closing about the desorption tube when the injection assembly is moved from the disengaged to the engaged position.

US Patent:

50656147, Nov 19, 1991

Filed:

Jul 31, 1990

Appl. No.:

7/560440

Inventors:

Thomas G. Hartman - Staten Island NY
John J. Manura - Pennington NJ
Santford V. Overton - Ringoes NJ
Christopher W. Baker - Lambertville NJ
John N. Manos - Trenton NJ

Assignee:

Rutgers University - New Brunswick NJ

International Classification:

G01N 3018

US Classification:

73 2335

Abstract:

A short path thermal desorption apparatus for use in a gas chromatoagraphy-detector unit (GC-DET) such as a gas chromatography-mass spectrometry system has a housing defining an upper compartment, and a desorption compartment. An upper front panel on the housing has an elongated longitudinally disposed opening which provides communication between the upper compartment and the exterior of the housing. An injection assembly is disposed at the exterior of the housing adjacent the upper front panel and is actuated from a disengaged position to an engaged position with the gas chromatography unit by a suitable gas powered cylinder mounted in the upper compartment. The injection assembly includes, a desorption tube for collecting and storing the sample compound to be analyzed and includes, means for passing a carrier gas therethrough to desorb the sample component when the desorption unit is heated, and a needle injector for passing the desorbed sample component to the GC-DET system for identification and quantification of the sample component. The desorption tube is operatively associated with a desorption block assembly having a pair of coacting heating blocks made of materials having a high coefficient of heat transfer and mounted for bilateral opening and closing about the desorption tube when the injection assembly is moved from the disengaged to the engaged position.