【摘要】 建立了超高效液相色谱—串联质谱仪测定稻田环境中的丙草胺和西草净的残留分析检测方法。糙米、稻壳、植株、土壤以及田水样品中的丙草胺和西草净以乙腈为提取剂,N-丙基乙二胺(PSA)净化,采用超高效液相色谱—串联质谱测定。丙草胺在0.01~5.0 mg/L范围内线性良好,相关系数为0.997 4,丙草胺在糙米、稻壳、植株、土壤以及田水中的平均加标回收率为71.8%~103.6%,相对标准偏差为1.7%~9.2%;西草净在0.005~2.5 mg/L范围内线性良好,相关系数为0.997 9,西草净在不同样品中的平均加标回收率为75.0%~107.3%,相对标准偏差在1.7%~11.9%之间。该方法重复性好,准确度、精密度均能满足农药残留量分析与检测的技术要求。更多还原

【Abstract】 A method for the simultaneous determination of residue of pretilachlor and simetryn in rice filed environment by ultra-performance liquid chromatography tandem mass-spectrometry( UPLC-MS/MS) was established.The residues in unpolished rice,rice husk,plant,soil and field water were extracted by acetonitrile,purified by N-propyl ethylenediamine.The residues of pretilachlor and simetryn in samples were determined by UPLC-MS/MS.Pretilachlor showed a good linear relationship in the range of 0.01 ~ 5.0 mg/L with the correlation coefficient of 0.997 4 and the average recovery rates in unpolished rice,rice shell,plant,soil and field water were 71.8% ~ 103.6%; Simetryn showed a good linear relationship in the range of 0.005 ~ 2.5 mg/L with the correlation coefficient of 0.997 9,and the average recovery rates in different samples were 75.0% ~ 107.3% with their relative standard deviations of 1.7% ~ 9.2%.The method has good repeatability,accuracy and precision,and can meet the technical requirements.更多还原