气相色谱法测定邻苯二甲酸酯类增塑剂的研究

DETERMINATION OF PHTHALATE PLASTICIZERS BY GAS CHROMATOGRAPHY

采用超声萃取-气相色谱法测定食品包装保鲜袋材料中的邻苯二甲酸酯类增塑剂,对样品前处理和色谱分离条件进行了研究和优化.结果表明:选用15 m×0.25 mm×0.33μm XC-1石英毛细管柱,甲苯溶剂超声萃取效果较好.最佳超声萃取条件为:甲苯为溶剂,超声时间为30 min,超声功率为180 W.方法的平均回收率为96.05%～105.1%,RSD为0.370 0%～5.750%(n=3),检测限为0.100 0～100.0 mg/L.方法简便、快速、灵敏.

A method was established for the determination of phthalate plasticizers in packaging materials by ultrasonic extraction-capillary gas chromatography.The pre-treatment method of the samples and the chromatographic conditions for the analysis were critically examined.The best results were obtained using XC-1 silica capillary column（15 m×0.25 mm×0.33 μm） and toluene as extraction solvent.The optimal extraction conditions were with toluene for 30 min with 180 W ultrasonic treatment.The recovery rates were between 96.05% and 105.1% and the relative standard deviations（RSD） were 0.370 0% to 5.750%（n=3）.The detection limit ranged from 0.1000 to 100.0 mg/L.The method is simple,rapid and sensitive.