Use of Pressurized Vials for Loading Sample Loops in Soil Gas Analyses1
- T. E. Stealey,
- J. L. Hern and
- E. J. Harner2
A technique was developed using small (3 mL) evacuated glass vials for soil gas sample storage and loading of gas chromatographic sample loops. Vial volume was reduced 2 mL by inclusion of glass beads. The vials were pressurized with 3.2 mL sample and used directly for loop loading via a specially contructed vial guide. Time course determinations on stored samples of C2H2 and Kr indicated leak losses of 0 to 0.2% d−1 when compared to the ideal technique of exhaustive loop purging from a standard gas tank. The low cost, reusability, and known vacuity of the vials, as well as the elimination of a transfer stop from storage container to a syringe prior to injection into a gas chromatograph, should favor their use in agronomic field and laboratory studies where numerous samples of the smallest possible volume must be taken.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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