铬天青S分光光度法快速测定膨化食品中的铝

Using chrome azurol S spectrophotometry to measure aluminium in extruded food

目的：建立一种简便易行测定膨化食品中铝的方法。方法：用改进后的铬天青S分光光度法测定铝含量。结果：改进后的方法线性范围由国标法的0～6μg提高到0～10μg,线性关系良好。曲线的回归方程为：Y=0.1174X-0.0236,相关系数0.9997,加标回收率93.0%～106.2%,方法的检出限0.37 mg/kg。结论：改进后的铝含量测定方法简便,容易控制,结果精确。

Objective ：To establish a simple determination method for aluminum in extruded food. Methods：To determine the content of aluminum in extruded food with improved methods of chrome azurol S spectrophotometry. Results ： Increased the linear range of the national standard method from 0 -6 μg to 0 - 10 μg with the improved method. There was a linear relationship. The curve regression equation was Y = 0. 1174X -0. 0236, the correlation coefficient was 0. 9997, the recovery rate was between 93.0% -106. 2%, the detection limit was 0. 37 mg/kg. Conclusion：The improved aluminum determination method is simple, easy to control and can obtain accurate results.