建立了同时检测竹笋中14种有机磷农药的基质固相分散-气相色谱(MSPD-GC)分析方法。竹笋样品经弗罗里硅土基质固相分散技术净化,用V(丙酮)∶V(乙腈)=1∶1淋洗,GC-FPD检测,基质标准曲线外标法定量。在0.05、0.50和1.00 mg/kg的添加水平下,14种有机磷农药的回收率为77.54%~114.16%,相对标准偏差为1.23%~5.01%,本方法的检出限为0.008~0.024mg/kg。

An analytical method was developed for the simultaneous determination of 14 organophosphorus pesticides in bamboo shoots by using matrix solid phase dispersion and Gas chromatography determination( MSPD-GC).Bamboo shoot samples were purified by MSPD and eluted by acetone-acetonitrile( 1∶ 1,V / V) were determined by gas chromatography( flame photometric detector). Matrix-matched calibrations were respectively used to quantify the residue concentrations in bamboo shoot samples. The recoveries were in the range of 77. 54% ~ 114. 16% and the relative standard deviation( RSDs) were 1. 23% ~ 5. 01% at 0. 05mg / kg,0. 50mg / kg and 1. 00mg / kg three spiked levels for all analysis. The limits of detection( LOD) were between 0. 008 mg / kg and 0. 024 mg / kg.