Determination of Etofenprox in environmental samples by HPLC after anionic surfactant micelle-mediated extraction (coacervation extraction).
A method is described for determination of residues of the insecticide Etofenprox in environmental samples. Anionic surfactant micelle-mediated extraction (coacervation extraction) was evaluated for isolation of Etofenprox before HPLC. The optimum conditions used for extraction included: 0.09 g sodium dodecanesulfonate (SDoS), 3.1 mL (3.3, for concentrations below 0.04 mg L(-1)) 12 mol L(-1) HCl, 5 min vortex stirring, 5 min centrifugation at 4000 rpm, 2 h equilibration time. The limits of quantification (LOQ) and detection (LOD) were 0.01 and 0.004 mg L(-1), respectively, and recoveries obtained from five real samples ranged from 94.33+/-2.48 to 100.13+/-2.71%. The precision of the method was good; relative standard deviations (RSD) were less than 7%.
Department of Applied Chemistry, China Agricultural University, Beijing, 100094, People's Republic of China. zqzhou@cau.edu.cn
Guifang
G
Jia
Chenglu
C
Bi
Qiuxia
Q
Wang
Jing
J
Qiu
Wenjing
W
Zhou
Zhiqiang
Z
Zhou
D002851:Chromatography, High Pressure Liquid; D006851:Hydrochloric Acid / Q000494:pharmacology; D008823:Micelles; D011722:Pyrethrins / Q000032:analysis* / Q000302:isolation & purification*; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology*; D013501:Surface-Active Agents / Q000494:pharmacology*
D008823:Micelles; D011722:Pyrethrins; D013501:Surface-Active Agents; C076840:ethofenprox; D012967:Sodium Dodecyl Sulfate; D006851:Hydrochloric Acid