火焰原子吸收分光光度法测定乳酸钙片中乳酸钙含量

摘要

Objective:A flame atomic absorption spectrometry method for the determination of calcium lactate in Compound Calcium Lactate Tablets was established.Methods:The sample solutions were prepared with water and sodium chloride was added to eliminate ionization interference.Results:The sample solutions were injected into air-acetylene flame.The content of potassium were calculat-ed by standard calibration curves.The linear range fro potassium chloride was 0~6.00μg/ml,r=0.9984.The average recovery rate was 99.6%,RSD=1.8%(n=9).Conclusion:The method is simple,rapid,accurate and reproductive.%目的：测定乳酸钙片中乳酸钙的含量。方法：用水制备供试品溶液，加入氯化镧消除干扰，将供试品溶液喷入乙炔一空气火焰，用标准曲线法测定钙的含量。结果：钙元素在0～6.00μg/ml范围内，线性关系良好，相关系数r=0.9984；在标示量的80％、100％、120％三个浓度点测定回收率，平均回收率为99.6%，RSD为1.8％(n=9)。结论：本法简单、快速、准确、重现性好，适用于乳酸钙片中乳酸钙的含量测定。