【摘要】 报道了一种通过衍生化反应和气相色谱检测来测定土壤及水稻样品中杀虫单残留的方法。样品中杀虫单在碱性条件下经水解反应生成沙蚕毒素,经乙醚萃取,通过液—液分配进行净化,用毛细管气相色谱法测定沙蚕毒素残留量。结果表明:使用该方法测定土壤、植株、糙米、谷壳样品中杀虫单残留量最低检出浓度分别为0.002,0.002,0.01,0.005mg/kg。方法添加回收率范围在81%～106%之间。更多还原

【Abstract】 This paper reported determination method for residue of monosultap in samples of paddy soil and rice plants by gas chromatography. Monosultap in the samples was hydrolyzed into nereistoxin under condition of the alkaline condition, extracted with aether , purified with liquid-liquid and detected by capillary gas chromatography with flame photometric detector. Detectable limits for monosultap residue in soil, plants, rice and rice hulls were 0.002, 0.002, 0.01 and 0.005 mg/kg, respectively. Recovery rates of the method ranged from 81%-106%.更多还原