顶空气相色谱法测定食用植物油中的六号溶剂残留量

Determination of No. 6 solvent residues in vegetable edible oil by head space gas chromatography

中文关键词:  顶空气相色谱  溶剂残留  食用植物油  氢火焰离子化检测器

英文关键词:headspace gas chromatography  solvent residue  vegetable edible oil  flame ionization detector

中文摘要:

      目的 建立顶空-气相色谱(headspace gas chromatography, HS-GC)测定食用植物油中六号溶剂残留量的分析方法。方法 样品经顶空处理进样, 采用ZB-WAX毛细管柱分离, 氢火焰离子化检测器检测, 以外标法定量。通过实验优化样品前处理条件、顶空自动进样条件, 确定最佳前处理方法、顶空平衡温度、平衡时间和样品称样量。结果 六号溶剂检测线性良好, 方法的检出限达2.0 mg/kg, 样品的回收率为90.6%~104.0%, 相对标准偏差为0.8%~2.0%。结论 本方法简便、快速、重现性好, 为食用植物油中的溶剂残留提供了可靠的检测方法。

英文摘要:

      Objective To establish a new method for the determination of solvent-extracted oil No.6 in vegetable edible oil by head-space gas chromatography (HS-GC). Methods The sample were determined by gas chromatography with head space sampling, separated by ZB-WAX column, and then detected by flame ionization detector with external standard method for quantification. The optimal pretreatment method, headspace equilibrium temperature, equilibrium time and sample weight were determined by optimizing the conditions of sample pretreatment and headspace automatic sampling. Results The method had a good linearity. The detection limit of the method could reach 2.0 mg/kg, the recovery ranged between 90.6%–104.0% and the relative standard deviations were 0.8%–2.0%. Conclusion This method is simple, rapid and reproducible, which can provide a reliable method for the determination of residual solvents in vegetable edible oil.