原子吸收分光光度法测定消岩颗粒中重金属含量

目的] 建立原子吸收分光光度法测定消岩颗粒中铅（Pb）、镉（Cd）、砷（As）、汞（Hg）、铜（Cu）重金属含量的方法。方法] 样品经湿法消解后，Pb、Cd的的含量采用石墨炉法原子吸收分光光度法测定，检测波长分别为283.5、229.1 nm；As、Hg的含量采用氢化物法原子吸收分光光度法测定，检测波长分别为194、254 nm；Cu的含量采用火焰法原子吸收分光光度法测定，检测波长分别为325 nm。结果] 10批消岩颗粒成品重金属含量均符合要求。结论] 本法简单，快速，准确且有较高的可重复性。

Determination of heavy metal content in Xiaoyan granules by atomic absorption spectrophotometry

Objective] To establish a method for the determination of the content Pb, Cd, As, Hg, Cu in Xiaoyan granules by atomic ab-sorption spectrophotometry. Methods] After the samples were digested by wet, lead, cadimium content were determined by graphite du-rance atomic absorption spectrophotometry, and the detection wavelength was 283.5, 229.1; the content of arsenic, mercury was deter-mined by hydride generation atomic absorption spectrophotometry, and the detection wavelength was 194 nm, 254 nm; the content of copper was determined by flame atomic absorption spectrophotometry, and the detection wavelength was 325 nm. Results] The metal content in the ten batch of Xiaoyan granule was all accorded with the requirement. Conclusion] The method is simple, rapid, accurate and has high repeatability.