【摘要】 样品经HNO3-H2O2高压密闭非完全消化,加入聚乙二醇辛基醚(OP-10)乳化剂处理试液,以La2O3为释放剂,用FAAS测定奶粉中高含量钙;同时对消化时间、消化剂以及OP-10用量等进行了优化选择.实验结果表明,此方法回收率达到101%~104%,精密度为0.29%.更多还原

【Abstract】 A method of incomplete digestion with flame atomic absorption spectrometry（FAAS） for the determination of high calcium content in milk powder is reported.The sample milk powder was incompletely digested with HNO₃-H₂O₂ in a pressurized vessel.Emulsifier OP-10 and releasing agent lanthanum were added for FAAS determination of calcium.Parameters were optimized.Recovery of the method was in the range of 101%～104% with RSD（0.29%）.更多还原