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Browse Prior Art Database

CAPILLARY COLUMN CRYOFOCUS DEVICE

IP.com Disclosure Number: IPCOM000005538D
Original Publication Date: 1984-Apr-01
Included in the Prior Art Database: 2001-Oct-12
Document File: 2 page(s) / 57K

Publishing Venue

Motorola

Abstract

The Capillary Cryofocus Device provides a method for the analysis of large dead volume sample injections encountered in Analytical Pyrolysis, Thermal Desorption, Static Headspace, and Light Hvdrocarbon Gas Analvsis bv Caoillaw Gas Chromatoaraohv (GC). The ouroose of the device is to condense the volatilizedcom~onerits ofa sample onto a ~ngleiheoretical piate of a wide bore analytical capillary column. The machined aluminum design is simple and is easily adaptable to any GC. In addition, the material's thermal characteristics allow for structural integrity, efficient cool down, and can closely follow the GC oven temperature ramp. The Capillary Cryofocus Device heats ballistically (GC oven temperature 70%) from a temperature below the K-type thermocouple probe (0.0020 inch O.D.) limit of - 133% to 0" in 58 seconds, and lags behind the oven ramp at 1 a to 5' when programmed at 4"lmin from 70".250.' These design features eliminate the need for re-injection techniques and still maintains the chromatographic quality of high resolution capillary GC.

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MOTOROLA Technical Developments Volume 4 April 1984

CAPILLARY COLUMN CRYOFOCUS DEVICE

ABSTRACT

   The Capillary Cryofocus Device provides a method for the analysis of large dead volume sample injections encountered in Analytical Pyrolysis, Thermal Desorption, Static Headspace, and Light Hvdrocarbon Gas Analvsis bv Caoillaw Gas Chromatoaraohv (GC). The ouroose of the device is to condense the volatilizedcom~onerits ofa sample onto a ~ngleiheoretical piate of a wide bore analytical capillary column. The machined aluminum design is simple and is easily adaptable to any GC. In addition, the material's thermal characteristics allow for structural integrity, efficient cool down, and can closely follow the GC oven temperature ramp. The Capillary Cryofocus Device heats ballistically (GC oven temperature 70%) from a temperature below the K-type thermocouple probe (0.0020 inch O.D.) limit of - 133% to 0" in 58 seconds, and lags behind the oven ramp at 1 a to 5' when programmed at 4"lmin from 70".250.' These design features eliminate the need for re-injection techniques and still maintains the chromatographic quality of high resolution capillary GC.

0 Motorola, Inc. 1984 36

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MOTOROLA Technical Developments Volume4 April 1984

0 Motorola, Inc. 1964

37

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