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Gas Chromatographic Analysis on Residual Concentration and Half-life Time of Cyfluthrin in Potato and Soil
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.6, pp.722-730
Han,
S. S., Jeong,
S. I., Chun,
H. J., Hoang,
G. C., &
Kim,
I.
K.
(2000). Gas Chromatographic Analysis on Residual Concentration and Half-life Time of Cyfluthrin in Potato and Soil. Analytical Science and Technology, 13(6), 722-730.
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Abstract
The residual concentration and half-life time of synthetic pyrethroid insecticide cyfluthrin in potato and soil were investigated by gas chromatography (GC). The pesticide in potato was extracted with n-hexane, filtered and concentrated. The concentrated phase was transferred to the Sep-Pak silica gel column and purified with acetonitrile and acetone for the analysis by gas chromatography equipped with electron capture detector (GC-ECD). From the standard additional experiments with 0.01 and <TEX>$0.1{\mu}g$</TEX>, the recoveries were 85-87% and the detection limit was 0.005 ng. The soil sample was extracted with acetone and dichloromethane. The organic phase was concentrated and redissolved with n-hexane and analyzed with GC-ECD after cleaned with Sep-Pak column. From the standard additional experiments with 0.01 and 0.1 ng, the recoveries were 84-88% and the detection limit was 0.005ng. The half-life time of cyfluthrin in the silty clay was 25 days in the room laboratory and 0.6 days in the fieJd test whereas it was 38 days and 0.5 days for each in case of silty loam.
- keywords
- Cyfluthrin, gas chromatographic analysis, residual analysis, half-life time of pesticides
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