摘要
目的：研究奶粉中钠和钾含量的测定方法。方法：采用灰化法对奶粉样品进行处理，再用火焰原子发射光谱法分别测定其中的钠和钾含量。结果：采用标准曲线法进行计算，方法的回收率在95%-108%之间，RSD（n=9）均小于3%，钠和钾的最低检出浓度分别为0.07和0.39 mg/L。结论：方法快速简便，结果准确可靠，测定结果与国标方法（火焰原子吸收光谱法）无显著性差异。
Objective：To develop a method to determinate the sodium and potassium content in the milk powder. Methods： After the milk powder sample was treated with heat to ashes （ dry method） , a flame atomic emission spectrum method was used to determine the sodium and potassium content in the sample. Results： In the given conditions, both of the relative standard deviations of results were under 3% and the recoveries were in the range of 95% - 108% and the LOD of sodium and potassium was 0.07 and 0.39 mg/L, respectively. Conclusion： There is no significant difference compared with the standard method.
出处
《中国卫生检验杂志》
CAS
2008年第3期449-450,498,共3页
Chinese Journal of Health Laboratory Technology
关键词
火焰原子发射光谱法
奶粉
钠和钾
Flame atomic emission spectrum method
Milk powder
Sodium and potassium
