SYMPOSIA PAPER Published: 01 January 1975
STP39008S

Guidelines for Quantitative Liquid-Liquid Extraction of Organophosphate Pesticides from Water

Source

A systematic approach for the development of quantitative analysis of organophosphate pesticides from water is presented. Information is presented on the different steps of aqueous pesticide residue analysis including liquid-liquid extraction, water and solvent phase separation, solvent drying, and a two-step evaporation of the extract which permits solvent volume reduction to 0.5 ml for recovery at low levels.

The p-value method of approach is used as a guide to optimize the liquid-liquid extraction step. The p-value determined in water is shown to be applicable to other types of water including river water, sea water, and secondary sewage effluent. Recovery studies are presented at nanogram/liter concentrations where the solvent evaporation procedure is shown to be critical.

Author Information

Suffet, IH
McFarland-Johnson-Gibbons Engineers, Inc., Woodbury, N.J.
Wu, C
McFarland-Johnson-Gibbons Engineers, Inc., Woodbury, N.J.
Wong, DTL
McFarland-Johnson-Gibbons Engineers, Inc., Woodbury, N.J.
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Details
Developed by Committee: D19
Pages: 167–182
DOI: 10.1520/STP39008S
ISBN-EB: 978-0-8031-5584-8
ISBN-13: 978-0-8031-5526-8