Transcription of Standard Operating Procedure: Sample Preparation and ...
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RSKSOP-175 Revision 2004 Page 1 of 14 Felisa Hudson Standard Operating PROCEDURES ample Preparation and Calculations for Dissolved Gas Analysisin water Samples Using a GC Headspace Equilibration :This Standard Operating procedure has been prepared for the use of the Ground water andEcosystems Restoration Division of the Environmental Protection Agency and may not bespecifically applicable to the activities of other organizations. THIS IS NOT AN OFFICIALEPA APPROVED METHOD. This document has not been through the Agency s peer reviewprocess or ORD clearance Purpose (Scope and Application):This method is applicable to the Preparation of water samples for determination of dissolvedgases. After quantitation of gas equilibrated into the prepared headspace, this method permitscalculation of the concentration of the dissolved gas in the water before equilibration.
A water sample is collected in the field or in the laboratory without headspace, in a serum bottle ... The sample bottle is then shaken at 1100 rpm on a rotary shaker for five minutes to allow the ... based on volume of gas in total volume of sample. 2) This concentration of gas is converted from ppm to the decimal equivalent of the volumetric ...
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