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建立了化妆品中二(噁)烷的同位素稀释-顶空气相色谱-质谱联用测定方法.称取2 g化妆品样品于顶空样品瓶中,加入1g氯化钠及20 mg/L氘代二(噁)烷内标溶液1 mL,再加入9 mL水.密封后摇匀,置于顶空进样器中,在70℃平衡40 min.气液平衡后的上部气体经HP-5MS石英毛细管气相色谱柱(30 m×0.25 mm×0.25 μm)分离后,采用选择离子扫描模式进行质谱定性及定量分析.二(噁)烷的方法定量限为2.5 mg/kg;在2.5~50 mg/kg的3个添加水平范围内的平均回收率为90.5% ~ 104.0%,相对标准偏差为1.26% ~ 3.98%.本方法准确、简便、快速,能够满足化妆品样品中二(噁)烷残留量的检测要求.

参考文献

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