陶瓷和玻璃食品包装铬溶出量测定方法

Determination Method of Chromium(Ⅵ) Released From Food Packaging Materials of Ceramic and Glass

目的建立陶瓷、玻璃食品包装中铬(Ⅵ)溶出量的测定方法。方法以4%乙酸溶液为萃取剂,在适合的酸性条件下,样品中溶出铬(Ⅵ)与二苯碳酰二肼显色生成紫色配合物,分光光度法测定。结果方法检出限为0.01 mg/L,线性范围为0.01～1.00 mg/L,R2=0.999 9,平均回收率在95.1%～99.1%。结论该方法快速简便、灵敏准确,可满足食品包装中微量溶出铬(Ⅵ)的测定。

To establish the method for determination of chromium （ VI ） in food packaging materials of ceramic and glass. Methods The extracting agent was 4% acetic acid solution, under acidic condition, the dissolved chromium （VI） from food ceramic and glass packaging materials reacted with Diphenyl Carbazide （DPC） and formed purple complex, which was determined by spectrophotometry. Results The detection limit was 0. 01mg/L, with the linear range of 0. 01 - 1.00 mg/L, the correlation coegicient was 0. 9999, and recov- eries ranged from 95. 1% to 99. 1%. Conclusion The method is simple, rapid, sensitive and accurate, it can be directly applied to detect trace dissolved chromium （ VI ） in food packaging materials.