Environmental Health - Toxic Substances Hydrology Program

Photo Galleries from Completed Investigations

USGS scientist operating a combination gas chromatograph/mass spectrometer.
USGS scientists have developed a method to detect chlorothalonil (a fungicide) and three of its environmental degradates in sediment and soil. After the target compounds are extracted from the sediment the samples are analyzed by gas chromatography/mass spectrometry (GC/MS). Chlorothalonil is widely used on peanut crops -- from the Pesticide Contamination and Environmental Exposure Investigation


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