顶空-气相色谱法测定葵花籽粕中六号溶剂残留量

Determination of solvent-extracted oil No.6 in sun flower seed meal by head-space gas chromatography

中文关键词:  顶空-气相色谱法  六号溶剂  葵花籽粕

英文关键词:head-space gas chromatography  solvent-extracted oil No.6  sun flower seed meal

中文摘要:

      目的 建立葵花籽粕中的六号溶剂残留量的顶空-气相色谱(HS-GC)分析方法。方法 样品葵花籽粕经N,N-二甲基甲酰胺(DMF)浸泡处理后顶空进样, 通过实验优化样品前处理条件、顶空自动进样条件和气相色谱条件, 确定最佳前处理方法、顶空平衡温度、平衡时间、气相色谱柱温度和分流比。结果 六号溶剂各组分达到完全分离, 线性良好, 方法的检出限可达1.50 mg/kg, 精确度为1.84%, 样品加标回收率为96%～113%。结论 本方法简便、快速、重现性好, 为葵花籽粕中的残留溶剂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 sun flower seed meal by head-space gas chromatography (HS-GC). Methods Samples of sunflower seed meal were soaked in N,N-dimethylformamide, and the qualitative and quantitative analysis was used by HS-GC. The experiment conditions were optimized. The sample preprocessing method conditions, the equilibrium temperature and time of headspace automatic sampler, the column temperature and the split ratio were all determined. Results The components of solvent-extracted oil No.6 were separated from each other completely. The method had a good linearity. The detection limit of the method could reach 1.50 mg/kg, with the accuracy of 1.84%, and the recovery of solvent-extracted oil No.6 was in the range of 96%~113%. Conclusion The method is simple, rapid and reproducible, which can provide a reliable method for the determination of residual solvents in sunflower seed meal.