Abstract |
The manual describes the analytical methods which are currently being used in the Public Health Service's Water Pollution Surveillance System in identifying chlorinated hydrocarbon pesticide levels in surface waters. Organic chemicals, as a group, have presented a special challenge to the laboratory because of the many thousands of such chemicals in use and the many complex mixtures of wastes produced in their manufacture. Specific identification and measurement of one class of organics, the chlorinated hydrocarbon pesticides, to a sensitivity of one microgram per liter or below is of particular concern. The carbon adsorption method, developed over a decade ago, has been effectively employed in pesticide pollution studies. |