【摘要】 提出了冷原子荧光法测定聚苯乙烯食品包装材料中汞的新方法。采用甲苯溶样 ,以 3g· L-1的硫代硫酸钠溶液反萃 ,反萃液经高锰酸钾溶液氧化 ,氯化亚锡还原。该法仪器价廉、灵敏、准确、快速。RSD<4.3% ,回收率为 90 .0 %～ 1 0 2 .0 %。更多还原

【Abstract】 A method for determining mercury in polyphenylethylene food packaging material is presented in this paper. The sample is dissolved with toluene, and mercury is stripped with Na2S2O3 solution, and the organic substances in the stripped solution is then oxidized by KMnO4. Mercury is then determined by cold vapour atomic fluorescence spectrometry. The method is convenient, sensitive and rapid. The RSD is less than 4.3%, and recoveries are in the range of is 90.0%~102.0%.更多还原