复合食品包装袋中二氨基甲苯的GC-MS测定方法研究

Determination of 2,4-Diaminotoluene in composite laminated food packaging bag by GC-MS

目的：建立二氨基甲苯残留的气相色谱一质谱检测方法。方法：沸水浸取样品中二氨基甲苯后，用甲苯进行液一液萃取，经三氟乙酸酐衍生化，再将衍生物进行GC—MS定性定量分析。结果：方法最低检出浓度为0．0002mg／L，相对标准偏差（RSD）为2．5％（n=6），样品加标回收率为98．11％～101．21％。结论：将GB／TS009．119—2003方法中的不足进行了一定的改良，用GC—MS方法检测复合食品包装袋是二氨基甲苯残留量，结果满意。

Objective：To establish a method for determination of 2,4 -Diaminotoluene residues by GC- MS. Method：2,4 - diaminotoluene in samples was extracted with boiling water, and the water was liquid - liquid extracted with methylbenzene. Finally,2,4- diaminotoluene of methylbenzene was derivated with trifluoro- acetic anhydride and its derivative was used for determination by GC -MS, Results：The detection limits were 0. 0002 mg/L,and RSD was 2. 5% （n =6） ,the recoveries were between 98. 11% and 101.21%. Conclusion：The established method is quite suitable for identification and quantization of 2,4 -diaminotoluene in composite laminated food packaging bag, and the bugs of GB/TS009. 119 -2003 were improved.