Journal
ANALYTICAL LETTERS
Volume 42, Issue 4, Pages 706-726Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032710902721949
Keywords
Pesticides; pyrethroids; solid-phase extraction; water analysis
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Funding
- Amorim e Irmaos S:A
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Seven pyrethroids (bifenthrin, fenpropathrin, -cyhalothrin, permethrin, -cypermethrin, fenvalerate, and deltamethrin) were extracted from water using C18 solid-phase extraction disks, followed by gas chromatography with an electron capture detector (GC-ECD) analysis. The limits of detection in water samples ranged from 0.5ng L-1 (fenpropathrin) to 110ng L-1 (permethrin), applying the calibration graph. The effects of different numbers of (re)utilizations of the same disks (up to four times with several concentrations) on the recoveries of the pyrethroids were considered. The recoveries were all between 70 and 120% after four utilizations of the same disk. There was no difference between these recoveries at a confidence level of 95%.
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