微波消解-原子吸收分光光度法测定明胶空心胶囊中的铬试验条件探讨

Testing parameters explore for microwave digestion-atomic absorption spectrophotometric determination of chromium in gelatin empty capsules

目的:建立并验证用微波消解-原子吸收分光光度法测定明胶空心胶囊中铬含量的方法。方法:采用微波消解系统消解样品,以石墨炉原子吸收分光光度法测定空心胶囊中铬元素的含量。结果:线性范围为0～60 ng.mL-1,回归方程为Y=0.01730X+0.0377,r=0.9995。样品加标平均回收率分别为102.5%,87.5%,82.9%,满足要求。结论:本法结果准确、操作简便、分析速度较快。

Objective：To establish and validate the microwave digestion-atomic absorption spectrophotometric method for determination of chromium content in the gelatin empty capsules.Method：Microwave digestion system was applied to deteriorate samples,and the Cr content was determined by Usegraphite fumace AAS method.Results：A linear relationship was observed between the absorbance and the concentration of Cr in the range of 0-60 ng·mL-1（Y=0.01730X＋0.0377,r=0.9995）.The average spiked recoveries were 102.5%,87.5%,and 82.9%,respectively,which met the requirements.Conclusion：This method is accurate,simple,feasible and with rapid analysis,which can be used for the determination of chromium content in the gelatin empty capsules