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Gas Chromatography Accessory for Handling Samples

IP.com Disclosure Number: IPCOM000045834D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Bryant, RM: AUTHOR [+2]

Abstract

This article describes an accessory and method for storing a test sample and subsequently introducing it to a gas chromatograph without exposing the sample to contamination.

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Gas Chromatography Accessory for Handling Samples

This article describes an accessory and method for storing a test sample and subsequently introducing it to a gas chromatograph without exposing the sample to contamination.

In various manufacturing and developmental activities, it is necessary to analyze samples of liquids, paste and solids to determine the presence or absence of various known or expected solvents. A technique for analyzing materials for vaporizable materials is gas chromatography. In this accessory the sample 10 is placed in a glass vial 12 and capped with a resilient cap, for example, rubber. The sample 10 is frequently gathered and stored for indeterminate periods of time. The sealed vial is convenient and provides a good enclosure for the sample. When the sample is to be tested, the vial 12 is placed in a block 16 surrounded and heated by a suitable resistance heater 18. The block is supported on a base 20 of thermal insulator material. An upright support 22 holds a vertically movable plunger carriage 24 on which is mounted two spaced needles 26. In use' the sample is placed in block 16 which is heated to the desired temperature, the plunger 24 moved downwardly so that the needles 26 Pierce the rubber stopper 14, and the solvent vapors removed through lines 28 adn 30 where they are introduced to the chromatograph. The vapors in the vial are swept out conventionally with a stream of inert gas. Leads 32 and 34 supply current to heater 18.

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