优化微波消化—FAAS法测定奶粉中钙

Quantitative determination of calcium in milk powers with orthogonal optimized microwave dissolution method using flame atomic absorption spectrometry

用微波消化技术对不同奶粉试样进行消化处理，通过正交试验优选出较佳的微波消化条件与操作参数，建立了微波消化-FAAS法测定奶粉中钙含量的方法。方法简单、快速，减少了样品预处理过程中的损失，回收率为93．3％，RSD为1．91％。

Many kind of milk powders are treated by microwave dissolution technique with different operation parameters in this experiment． In order to seek the optimum digestion condition of the sample， Orthogonal test is used． A quantitative determination method of calcium in milk powders using flame atomic absorption spectrometry is established， which is easy and time－saving． This method avoids the losses of calcium during the pretreatment．The experiment recovery is 93．3％，and the precision is 1．91％．