2016/06/15 13:56
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产品配置单:
GC5890N气相色谱仪
型号: GC5890N
产地: 江苏
品牌: 南京科捷
¥3万 - 5万
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方案详情:
复合膜在印刷、复合、涂布等生产工序中使用了大量的有机溶剂,如甲苯、二甲苯、乙酸乙酯、丁酮、乙酸丁酯、乙醇、异丙醇等。这些溶剂或多或少地残留在复合膜中,若用含有较高残留溶剂的复合膜来包装食品、药品等,将会危害人的身体健康。苯类溶剂的毒性较大,如渗入皮肤或血液会危及人的血球及造血机能,损害人的神经系统,导致白血病发生,美国FDA将它列为可致癌化学品。
残留在复合膜内的苯类溶剂,易被所包装的食品吸附,导致食品污染。近年来,由于食品包装中的有害物质残留过高导致食品被污染而引起中毒的事件时有发生。残留溶剂的测定具有重要意义。
检测复合膜中25种残留溶剂可采用静态顶空气相色谱法。
测定仪器与设备
气相色谱仪(氢火焰检测器);顶空进样器,顶空样品瓶(20mL);剪刀,刻度尺,镊子,压盖钳。
测定时顶空进样器条件
加热温度:120; 加热时间:30min;加压时间:3min;进样时间:0.1min。
测定方法:复合膜通过顶空进样器加热进样,DB-FFAP毛细管色谱柱(60m×0.32mm×1.00µm)分离,氢火焰检测器(FID)检测,内标法定量。
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