Samples were extracted by methanol, cleaned up by dichloromethane, in addition, samples of Polygonum Capitatum Buch were cleaned up on a column of neutral alumina. The content of metalaxyl was determined by external standard method.
采用HPLC-UV对头花蓼植株及土壤中甲霜灵的残留量进行测定，样品采用甲醇提取，中性氧化铝柱净化，外标法定量。
参考来源 - 广枯灵中恶霉灵和甲霜灵在中药材头花蓼及土壤中的残留消解动态研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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