【摘要】 提出一种食品塑料包装袋中残留甲苯的气相色谱分析方法更多还原

【Abstract】 A method for analysis of residual toluene in plastic packing bags by gas chromatographic headspace analysis is presented. This method is very simple and accurate. It only requires one column:0 5m×2mm i. d. packed with 102 white support DMCS coated with 20% PEG 20M. The relation between the preheating temperature of sample and the peak height of toluene can be approximately expressed as H =4 156e 0 126 T .The precision of this method is 4% and its detectable limit is 0 031mg(toluene)/m 2.更多还原