USGS - science for a changing world

Environmental Health - Toxic Substances

Crosscutting Topics

Methods

Field and laboratory environmental measurement methods

The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program develops field methods to measure a wide range of environmental properties, and develops approaches and protocols used to assess or characterize contamination.

The Program also develops laboratory analytical methods to measure a wide variety of chemicals in environmental media.

Image of test sample bottles
Solar-distilled plant water that has gone through various levels of laboratory preparation to remove constituents that can interfere with subsequent tritium analysis. A 2-gram solid-phase extraction column was necessary and sufficient for accurate determination of tritium concentrations in water from test plants (creosote bush, Larrea tridenatata) -- from the Detecting Tritium in Plants Photo Gallery

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