食品用纸包装容器中17种残留溶剂的测定研究

Determination of 17 Residual Solvents in Paper Packages and Containers for Food

目的研究食品用纸容器中易残留的17种有机溶剂的检测方法。方法配制17种溶剂的混合标准溶液,利用顶空-气相色谱技术进行了定量分析,研究色谱柱类型、平衡时间、平衡温度对方法的影响,绘制标准校正曲线,同时对60批次食品用纸包装容器样品进行了残留溶剂检测。结果色谱柱、平衡时间和平衡温度对方法的分析灵敏度均有影响,在HP-INNOWax（60 m×0.32 mm,0.50μm）色谱柱、平衡温度为100℃和平衡时间为30 min的优化条件下,17种溶剂能在30 min内有效分离,试验的加标回收率为91.2%~98.6%,相对标准偏差为1.56%~4.97%。60批次食品用纸包装容器样品中苯系溶剂检出率为16.7%,残留溶剂检出率为91.7%。结论通过优化参数可以建立一种快速可靠的食品用纸包装容器残留溶剂的检测方法,实际样品中残留溶剂检出率较高,对其进行研究和监测对维护食品安全十分重要。

Objective To study the detection method for 17 possible residual organic solvents which were easily left in the paper container for food. Methods Mixed standard solution of 17 organic solvents was prepared and quantitatively analyzed by head-space gas chromatography. The effects of chromatographic column, equilibrium time and equilibrium temperature were studied, and the calibration curve was drawn. Meanwhile, 60 paper samples were determined. Results The chromatographic column, the equilibrium time and the equilibrium temperature had influence on the sensitivity of the analytical method. Under the optimal conditions of HP-INNOWax（60 m×0.32 mm,0.50 μm）, 100 % and 30 min, 17 solvents could be effectively separated within 30 min, the recovery of standard addition was 91.2% -98.6% , and the relative standard deviation was 1.56% -4.97%. The detection rates of benzene solvents and total residual solvents in 60 paper packaging samples were 16.7% and 91.7%, respectively. Conclusion A fast and reliable approach to determine residual solvents in paper packages and containers can be established by optimizing parameters. Because of the high detection rate, it is important to research and monitor residual solvents in paper packages and containers from the view of maintaining the food safety.