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凝胶渗透色谱-固相萃取净化测定茶叶中16种菊酯残留量

Chinese Journal of Analysis Laboratory(2009)

Cited 14|Views20
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Abstract
建立了以凝胶渗透色谱(GPC)和固相萃取(SPE)净化,气相色谱-质谱(GC-MS)负化学源(NCI)技术测定茶叶中七氟菊酯、四氟菊酯、丙烯菊酯、联苯菊酯、胺菊酯、甲氰菊酯、氯氟氰菊酯、氟丙菊酯、苯醚氰菊酯、氟氯氰菊酯、氯氰菊酯、氟氰戊菊酯、氰戊菊酯、氟胺氰菊酯、溴氰菊酯、氯菊酯等16种菊酯残留量的方法。样品经V(丙酮)∶V(乙酸乙酯)∶V(正己烷)=1∶2∶1提取,经GPC去除大分子的色素和类脂杂质,弗罗里硅土SPE柱进一步净化,以毒死蜱同位素D-10作内标,内标法定量。方法的回收率67.2%~108%之间。变异系数小于18%。16种菊酯方法定量限在0.0125~0.025 mg/kg之间。
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