摘要:
为研究NY/T 761-2004(农业行业标准)用于蔬菜有机磷农药多残留检测中的样品基质干扰问题,根据NY/T 761-2004分析众多蔬菜样品,结合气质联用技术,评估蔬菜样品基质对有机磷农药多残留分析的干扰。结果表明,用NY/T 761-2004检测蔬菜有机磷农药多残留时,绿叶菜类、白菜类、瓜类、茄果类、豆类、薯芋类和根菜类蔬菜几乎没有样品杂质峰,有机磷农药测定不受干扰;甘蓝类蔬菜(如紫甘蓝、甘蓝和西兰花等)有显著的样品杂质峰,敌敌畏、甲胺磷、甲拌磷和甲基毒死蜱等测定常受干扰;葱蒜类蔬菜(如蒜、葱和韭菜等)有较强的样品杂质峰,有机磷农药多残留测定无法进行。
Abstract:
Thousands of vegetable samples were tested for the multi-residue analysis of organophosphorus pesticides in vegetables according to Chinese method NY/T761-2004, the final identification of organophosphorus pesticides in vegetables was made by GC/MS, and the matrix interference with the multi-residue analysis of organophosphorus pesticides in vegetables was evaluated. There was almost no matrix interference with the multi-residue analysis of organophosphorus pesticides in leafy greens, Chinese cabbage, gourd, solanaceous fruits, legume, tuber taro and root crop vegetables. There was some matrix interference with the multi-residue analysis of organophosphorus pesticides in cabbage vegetables and the analysis of dichlorovos, methamidophas, phorate and chlorpyrifos-methyl in purple cabbage, cabbage and broccoli was usually interfered with, and there was so serious matrix interference with organophosphorus pesticides in alliaceous vegetables(e.g., garlic, shallot and leek) that the multi-residue analysis of organophosphorus pesticides in alliaceous vegetables could not be done according to Chinese method NY/T761-2004.
下载:
