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

2001 ◽  
Author(s):  
L.R. Zimmerman ◽  
A.P. Strahan ◽  
E.M. Thurman
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