原子吸收法对钙的测定

Determination of Calcium by Atomic Absorption Spectrometry

探讨原子吸收分光光度法测定食品中钙的方法。钙单元素检测范围在0～5μg/ml浓度内,标准曲线线性关系良好,(r=0.99942);相对标准偏差为1.59%～2.19%,加标回收率95.13%～96.28%。结论:该检测结果与国标方法比较无显著性差。该方法抗干扰能力强,检出限低,重现性好,精密度高,回收率高,操作快速简洁等优点。适合开展大批量检测工作,可为食品中钙的含量测定提供技术支持。

This paper is to investigate the method to determine calcium in food by the atomic absorption spectrometry. The range of Calcium single-element detection is in 0-5μg/ml concentration, and the standard curve linear relationship is good, （r=0.99942）; The relative standard derivations for Ca is 1.59%-2.19% respectively. The recoveries of samples for Ca is 95.13%-96.28% respectively. Conclusion： Results of the testing methods has no significant difference with the national standard. This method has strong anti-interference ability, low detection limit, good reproducibility, high-precision, high-rate, simple and fast operation and other advantages. To carry out testing for high-volume work can provide the technical support for the Calcium determination.