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Analysis of multiple pesticide residues in rice by LC–MS/MS

机译：分析多个大米的农药残留

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摘要

A multiresidue method without cleanup step was validated for simultaneous determination of multiclass pesticide residues in rice. The extracted incurred residues of pesticides were separated on a reversed-phase column and quantified by tandem mass spectrometry (MS/MS). The method accuracy was in the range of 71–108%, and the precision was in the range of 4–20% for 25 out of 28 selected pesticides. The method quantification limits for 25 selected pesticides were below Codex and EU maximum residue limits (MRL). The selected 25 pesticides met the EU-SANTE and FAO/WHO Codex Alimentarius Commission method validation guidelines. The interday repeatability of the optimized method was between 4 and 18% (n = 6). The expanded uncertainty calculated for the optimized method ranged from 22 to 48%. The results obtained demonstrated the method’s suitability for routine analysis. In total, 35 samples were analyzed of which, 22 samples (62%) were found to be contaminated with pesticides concentrations ranging from 0.010 to 0.297 mgkg~(?1).
机译：没有清理步骤是multiresidue方法验证的同时测定多级大米的农药残留。提取所残留的农药在反相柱分离量化的串联质谱分析(MS / MS)。该方法准确性在71 - 108%的范围,和精度是在4 - 20%的范围25的28所选农药。量化限制了25所选农药低于法典和欧盟最大残留限量吗(推广)。EU-SANTE和粮农组织/世卫组织食品法典委员会的方法验证指导方针。interday优化方法的可重复性4 - 18% (n = 6)。扩大不确定性的优化计算方法从22 - 48%不等。证明了常规方法的适用性分析。, 22个样本(62%)被发现农药污染的浓度从0.010到0.297 mgkg ~(? 1)。

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