稻田土壤、植株和大米中的农药残留分析

建立了气相色谱-质谱法检测稻田土壤、植株和大米中的12种农药残留分析方法。样品经乙腈提取,Florisil层析小柱净化,气相色谱-质谱法检测。12种农药均具有良好的线性关系,相关系数不低于0.998,1.0、0.10、0.05 mg/L 3个浓度混合标准溶液的加标回收率为90.5%～101.2%,相对标准偏差为2.1%~4.7%,检出限为0.005~0.015 mg/L。该方法具有检测结果准确可靠、简便快速等优点。

Study on pesticide residues analysis in paddy soil, rice straw and grain

A GC-MS method for determination of 12 pesticide residues in rice straw,paddy soil and grain was developed.The pesticides in samples was extracted with acetonitrile and cleaned up with florisil column,and then detected by gas chromatography-mass spectrometry.The calibration curves for 10 pesticide residues all had good linear relationships with correlation coefficients not less than 0.998.The spiked recoveries at three concentrations of 0.05,0.10,1.0 mg/L were ranged from 90.5% to 101.2 with relative standard deviations of 2.1%~4.7%.The limits of detection were in the range of 0.005~0.015 mg/L.It was an effective method which fit for the pesticide residues analysis and has high accuracy,precision and sensitivity.