ICP-AES法测定泡打粉中的铝

A method to determine aluminum in baking powder by inductively coupled plasma-atomic emission spectrometry

目的：建立ICP-AES法测定泡打粉中的铝,加强监测,以期降低面制食品中的铝含量.方法：湿法消化对样品进行前处理,采用ICP-AES法测定泡打粉中的铝.结果：铝浓度在0.1～50 mg/L范围内,回归方程为Y=-0.4520＋62.5358X,相关系数r=0.9998,检出限为0.022 mg/L,相对标准偏差RSD为2.07%,回收率96.7%～100.1%.结论：该法具有快捷,回收率高,准确度与精密度好等特点.

Objective：To establish a method to determine aluminum in the baking powder by inductively coupled plasma -atomic emission spectrometry, strengthening supervision, then looking forward to debase aluminum in the flour foods. Methods：The pretreatment was performed using acid digestion technique, and the aluminum in the baking powder was determined by inductively coupled plasma -atomic emission spectrometry. Results：The linear range of this method was 0. 1 -50 mg/L Regression formula was Y = - 0. 4520 ＋ 62. 5358X, r = 0. 9998. The detection limit of this method was 0. 022 mg/L, and the recovery was at the range of 96. 7% -100. 1%. Conclusion ：The described method is fast and of high recovery , with satistled accuracy and precision.