【摘要】 采用气相色谱(μ-ECD)开发了高效氯氟氰菊酯在万寿菊上的残留分析方法,利用QuChERS前处理方法,经乙腈提取、PSA净化,氮气吹干后用正己烷定容,外标法定量。高效氯氟氰菊酯在万寿菊中的添加回收率为97%～99%,相对标准偏差在4.0%～8.5%。笔者建立了万寿菊中高效氯氟氰菊酯气相色谱残留分析方法,能够满足万寿菊样品中的高效氯氟氰菊酯的定量分析,并对万寿菊高效氯氟氰菊酯最终残留量进行了检测,样品中的高效氯氟氰菊酯均未检出。更多还原

【Abstract】 The residue analysis method of lambda-cyhalothrin in marigold was developed by gas chromatography(μ-ECD). The samples were prepared by QuEChERS method. It was extracted by acetonitrile, then purified by PSA, dried by nitrogen. After that, it was brought to volume by n-hexane, and quantified by external standard method. The recoveries of lambda-cyhalothrin in marigold were between 97% and 99%, with the relative standard deviations were from 4.0% to8.5%. The gas chromatography method for the determination of lambda-cyhalothrin residue in marigold was established,which could meet the requirements of the analysis of lambda-cyhalothrin in marigold samples. The final residue of lambda-cyhalothrin in marigold was analyzed, and no lambda-cyhalothrin was detected in the sample.更多还原