原子荧光光谱法测定矿物药大青盐中总砷和总汞的含量

Determination of Total Arsenic(As) and Total Hydrargyrum in Mineral Salt of Halite Drug by Atomic Fluorescence Spectrometry

目的研究矿物药大青盐中总砷和总汞的测定方法。方法采用湿法消解,双道原子荧光光谱法测定大青盐中的总砷和总汞。结果砷浓度在0～10μg.L-1、汞浓度在0～1.0μg.L-1范围内与原子荧光强度呈良好的线性关系,相关系数砷为0.9992、汞为0.9904,方法的检出限砷为0.0259μg.L-1、汞为0.0061μg.L-1,回收率砷为90.9%～100.8%、汞为90.0%～101.3%。结论该方法专属性强、简便易行、灵敏度高,可用于矿物药大青盐中有害元素总砷和总汞的限量控制。

Objective To establish a method for determination of total Arsenic（As）and total Mercury in mineral salt of Halite drug.Methods The mineral drug were dissolved by soak of wet method,and As and Hg in them were determined by double-channel atomic fluorescence spectrometry.Results The mineral drug content was linear with the fluorescence intensity in the range of As 0~10μg· L-1 and Hg 0~1.0μg·L-1 with correlation coefficient of 0.9992 and 0.9904,respectively.The detection limit of As was 0.0259μg·L-1 and Hg was 0.0061μg·L-1.Recovery rate of As was 90.9%~100.8%;Hg was 90%~101.3%.Conclusion The method is specific,simple and sensitive.It can be used in the limit control for harmful elements of As and Hg in salt of halite drug.