微波消解-原子荧光光谱法测定进口婴幼儿罐装食品中的锡

Determination of tin in import infant canned food by microwave digestion-atomic fluorescence spectrometry

目的应用微波消解-原子荧光光谱法测定进口婴幼儿罐装食品中的锡。方法样品用微波消解后,以锡高性能空心阴极灯为检测光源,使用AFS-9800双道原子荧光光度计来检测进口婴幼儿罐装辅食中的锡。结果实验结果表明,该方法的最低检出限为1.25μg/kg,精密度为0.8%,标准曲线范围为0~80 ng/m L,相关系数为0.9992。实际样品测定中,锡的回收率达到93.6%。结论该检测方法简便快捷、灵敏度高,适用于进口婴幼儿罐装辅食中的锡的检测分析。

Objeetive To develop a method for the determination of tin in import infant canned food by microwave digestion-atomic fluorescence spectrometry. Methods After the samples were digested by microwave, the tin in import infant canned food was detected by the AFS-9800 double channel atomic fluorescence photometer with high-performance hollow cathode lamp as detecting light. Results The experiment results showed that the detection limit of the method was 1.25μg/kg, the precision was 0.8% and the range of standard curve was 0-80 ng/mL with correlation coefficient of 0.9992. In practical sample determination, recovery rate reached to 93.6%. Conclusion This method is quick, simple, and sensitive, which is suitable for the detection of tin in import infant canned food.