原子荧光双标准夹心法快速测定食品中的汞

Rapid determination of mercury in food by atomic fluorescence with double standard sandwich method

目的建立原子荧光双标准夹心法测定食品中汞的分析方法。方法以鱼罐头、大米、干香菇等为样品,经微波消解后,用原子荧光双标准夹心法与标准曲线法对照定量测定。结果汞的检出限为0.015μg/L,相对标准偏差小于4%(n=4),回收率为93.50%~97.75%。结论与国家标准方法相比,本研究方法无需绘制标准曲线和测定空白溶液,结果计算简单,操作快速简便,为食品中汞的测定提供了一种新型的分析技术。

Objective To establish a method for the determination of mercury in food by atomic fluorescence with double standard sandwich method. Methods The samples of canned fish, rice and dried mushroom were digested by microwave, and quantitative detected by atomic fluorescence double standard sandwich method and standard curve method. Results The limit of detection of mercury was 0.015 μg/L, the relative standard deviation was less than 4%(n=4), and the recoveries were 93.50%-97.75%. Conclusion Compared with the national standard method, this method has the characteristics of no need to draw the standard curve, without deducting the blank value, fast and simple. It provides a new analytical technique for the determination of mercury in food.