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Watershed- and Regional Scale Contamination

USGS scientist operating an autotrace unit to process water samples in a laboratory.
USGS scientist using an autotrace to extract pesticides from water samples in preparation for gas chromatography/mass spectrometry (GC/MS) analysis. The autotrace automates the processing of large numbers of samples -- from the Pesticide Contamination in Varied Pesticide-Use Settings Investigation


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Page Last Modified: Tuesday, 06-May-2014 14:36:56 EDT