ICP-AES法测定易拉罐铝合金中的有害元素

Determination of harmful elements in aluminium alloys for the tin of beverage by inductively coupled plasma atomic emission spectrometry

研究了电感耦合等离子原子发射光谱 (ICP AES)测定食品包装铝合金中常见有害元素的方法 ,考察了铝基体对测定的影响 ,按 GB3 562 85标准方法进行了浸泡实验 .方法的检出限为 0 .5× 1 0 - 1 0 g· m L- 1 ～65.5× 1 0 - 1 0 g· m L- 1 ,回收率在 92 %～ 1 0 5% ,精密度 (RSD,n=5)为 3 .67%～ 5.72 % .结果表明 4 %乙酸浸泡液中可检出 0 .0 4 0 μg·m L- 1

A sensitive method for direct determination of harmful elements in packing aluminium alloys for the tin of beverage by inductively coupled plasma has been described.The influence of bass aluminium for determination has been studied.The test of soak has been teken according to the rules of the national standard method (GB365285).Experimental condition limits were 0.5×10 -10 g·mL -1 ～65.5×10 -10 g·mL -1 , pretisions were 3.67 %～5.72 % RSD( n =5),and retes of recovery were 92 %～105 %.The 0.040μg·mL -1 chromium can be detected in soak solution of 4 % acetic acid.