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National Water Quality Laboratory

Sunday December 17, 2017

USGS Water-Resources Investigations Report 95-4105

Filtration of Water-Sediment Samples for the Determination of Organic Compounds

Mark W. Sandstrom

1995

This report describes the equipment and procedures used for on-site filtration of surface-water and ground-water samples for determination of organic compounds. Glass-fiber filters and a positive displacement pumping system are suitable for processing most samples for organic analyses. An optional system that uses disposable in-line membrane filters is suitable for a specific gas chromatography/mass spectrometry, selected-ion monitoring analytical method for determination of organonitrogen herbicides. General procedures to minimize contamination of the samples include preparing a clean workspace at the site, selecting appropriate sample-collection materials, and cleaning the equipment with detergent, tap water, and methanol.

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