将已粉碎的塑料样品用模拟汗液在37 ℃下振荡1 h。向提取液中加入由丙酮(作分散剂)和四氯化碳(作萃取剂)充分混和的混合液,以3 000 r·min-1转速离心5 min,分取1 μL有机相进样作气相色谱分析。色谱分离时采用HP-5毛细管柱,采用氢火焰离子化检测器进行测定。提取液经上述分散液液微萃取分离富集后测定其中17种邻苯二甲酸酯类化合物(PAE′s)。在所试验的5种塑料制品样品的提取液中均检测出邻苯二甲酸二(2-乙基己基)酯,其最大溶出量为51.47 μg·L-1。在塑料包装袋的提取液中检出了邻苯二甲酸二(2-乙氧基乙基)酯,其最大溶出量为111.14 μg·L-1。17种PAE′s的检出限(3S/N)在0.15~5.05 μg·L-1之间。

Smashed plastics sample was shaked with simulated sweat at 37 ℃ for 1 h. A mixture of acetone (as dispersion agent) and CCl4 (as extractant) was added promptly to the extract, mixed thoroughly and centrifuged at 3 000 r·min-1 for 5 min. One μL of the organic phase containing the phthalates (PAE′s) was taken for GC analysis, using HP-5 capillary column for separation and hydrogen flame ionization detection for determination. Amounts of 17 PAE′s in the simulated sweat as dissolved from the plastics, was determined. Di-2-ethylhexyl phathalate was detected in extracts of 5 plastics, with 51.47 μg·L-1 as the maximum dissolved amount. Bis-2-ethoxyethyl phthalate, with the maximum amount of 111.14 μg·L-1, was found in extracts of packing bags. Detection limits (3S/N) of the 17 PAE′s were obtained in the range of 0.15-5.05 μg·L-1.