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Method of Analysis and Quality-Assurance Practices by the U.S. Geological Survey Organic Geochemistry Research Group—Determination of Four Selected Mosquito Insecticides and a Synergist in Water Using Liquid-Liquid Extraction and Gas Chromatography/Mass Spectrometry

Open-File Report 2001-273
Prepared as part of the Toxics Substances Hydrology Program
By: , , and 
https://doi.org/10.3133/ofr01273

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Abstract

A method of analysis and quality-assurance practices were developed for the determination of four mosquito insecticides (malathion, metho-prene, phenothrin, and resmethrin) and one synergist (piperonyl butoxide) in water. The analytical method uses liquid-liquid extraction (LLE) and gas chromatography/mass spectrometry (GC/MS). Good precision and accuracy were demonstrated in reagent water, urban surface water, and ground water. The mean accuracies as percentages of the true compound concentrations from water samples spiked at 10 and 50 nanograms per liter ranged from 68 to 171 percent, with standard deviations in concentrations of 27 nanograms per liter or less. The method detection limit for all compounds was 5.9 nanograms per liter or less for 247-milliliter samples. This method is valuable for acquiring information about the fate and transport of these mosquito insecticides and one synergist in water.

Suggested Citation

Zimmerman, L.R., Strahan, A.P., and Thurman, E.M., 2001, Method of analysis and quality-assurance practices by the U. S. Geological Survey Organic Geochemistry Research Group—Determination of four selected mosquito insecticides and a synergist in water using liquid-liquid extraction and gas chromatography/mass spectrometry; U.S. Geological Survey Open-File Report 01–273, 11 p., https://doi.org/10.3133/ofr01273.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Method of Analysis
  • Method Performance
  • Quality-Control Data
  • Conclusions
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Method of analysis and quality-assurance practices by the U. S. Geological Survey Organic Geochemistry Research Group—Determination of four selected mosquito insecticides and a synergist in water using liquid-liquid extraction and gas chromatography/mass spectrometry
Series title Open-File Report
Series number 2001-273
DOI 10.3133/ofr01273
Year Published 2001
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Kansas Water Science Center, Toxic Substances Hydrology Program
Description iv, 11 p.
Country United States
State Kansas
Online Only (Y/N) Y
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