分光光度法测定食品中的铝含量

Spectrophotometry to Determinate Aluminum in Food

采用分光光度法测定了食品中铝含量。食品经高温灰化后,在乙酸-乙酸钠缓冲介质下,铝离子与铬天青S、溴化十六烷基三甲胺反应形成三元配合物。结果表明,在最佳实验条件下,铝含量在0～0.16μg/mL范围内有良好的线性关系,相关系数为0.999 3,回收率在95.45%～101.25%之间。该方法用于实际样品中铝含量的测定,结果准确、操作简单快速,所得结果令人满意。

In this study,we determined the aluminum content in food by spectrophotometry.After food was digested by high temperature dry method,the temary complex was formed via the reaction trivalent aluminum ion with chrome azurol S and hexadelyl trylammonium bromide in the buffer of acetic acid-sodium acetate.The results showed that under the optimal conditions,the linear range of calibration curve of the lead was 0~0.16 μg/mL,the relative of coefficient was 0.9993,and the rate of recoveries were between 95.45%~101.25%.The method could be applied with the analysis of the aluminum content in food with satisfactory results and speediness.