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자동화된 LPME(Liquid Phase Microextraction)장치를이용한 다성분 농약분석
명승운,정흥래 한국분석과학회 2005 분석과학 Vol.18 No.3
In this study, the optimum conditions for the LPME (liquid phase microextraction) were investigated to overcome several shortcomings of traditional liquid-liquid extraction method. The LPME, which is automatic and dynamic, was used to analyze the five pesticides (dementon-S-methyl, diazinon, parathion, fenitrothion, EPN) extracted from vegetable, and HP 6890 GC/NPD was used as an analytic instrument. It was possible to optimize the extraction condition using the automatic LPME. The optimum extraction rate was obtained at pH 3.0 and 100g/mL of salt concentration and standard curve showed linearity with over r2=0.9921 in the range of 0.2~10g/g. The relative standard deviations were 7.7%, 9.8%, 7.8%, 9.7% and 8.2% in the 5.0g/g concentration of dementon-S-methyl, diazinon, parathion, fenitrothion and EPN, respectively. The acquired accuracies were satisfactory showing 12.7%, 7.8%, 10.4%, -6.7% and -0.7% for dementon-S-methyl, diazinon, parathion, fenitrothion and EPN respectively.