EPA Draft Method 1660, 1993
The determination of pyrethrins and pyrethroids in municipal and industrial wastewaters.
HPLC with UV detector, using 2 nd wavelength confirmation. Reporting levels in the 2.5-5 ug/L range.
Extraction hold time 7 days, if not extracted within 72 hours adjust pH to 5.0-7.0.
Dechlorinate if needed.
You, Weston, Lydy, Nov. 2003
A sonication extraction method for the analysis of pyrethroid, organophosphate, and organochlorine pesticides from sediment by gas chromatography with electron-capture detection.
GC/ECD using second dissimilar column confirmation and extraction clean-up steps.
Reporting levels in the tenths of a ug/kg range for sediment. Hold time not stated but frozen spiked samples have given consistent results after more than 4 months of storage.
USGS Water Resources Investigations Report 01-4098, 2001
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory – determination of moderate-use pesticides and selected degradates in water by C-18 solid phase extraction and gas chromatography/mass spectrometry.
GCMS narrow-range scan in selected ion mode (selected-ion monitoring groups). Hold time: 3-15 days.
Solid phase extraction in this publication may not be suitable for run-off or stormwater.
California Dept. of Food and Agriculture
Center for Analytical Chemistry Environmental Monitoring Section
Determination of pyrethroids in sediment water EMON-SM-52-7 2003
GCMS in selected-ion mode. Hold time: 3-13 days.
See the NorCal SETAC Summer 2005 newsletter for discussion articles on these and other approaches to the analysis of pyrethroids in environmental water and sediment samples.
Extraction options discussed in the literature include waters by liquid-liquid extraction and solid phase extraction; soils by soxhlet, sonic horn and sonic bath.
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