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采用电感耦合等离子体原子发射光谱法同时测定金属饰品中铅、镉、铬、汞、锑、砷、硒、钡、镍的含量。用体积比为3∶1的浓硝酸和浓盐酸微波溶解样品,研究了样品的消解方法、消解介质、分析谱线及工作参数等对检测结果的影响。方法的检测限(mg/L):铅0.06、镉0.009、铬0.002、汞0.04、砷0.02、硒0.01、钡0.01、锑0.008、镍0.001,该方法快速简便,方法的回收率和精密度分别为96%～103%和0.48%～1.23%。
Simultaneous Determination of Lead, Cadmium, Chromium, Mercury, Antimony, Arsenic, Selenium, Barium and Nickel in Metal Jewelry by Inductively Coupled Plasma Atomic Emission Spectrometry. Samples were digested with concentrated nitric acid and concentrated hydrochloric acid in a volume ratio of 3:1. The effects of digestion method, digestion medium, analytical line and working parameters on the test results were studied. The limits of detection (mg / L) of the method were as follows: lead 0.06, cadmium 0.009, chromium 0.002, mercury 0.04, arsenic 0.02, selenium 0.01, barium 0.01, antimony 0.008, nickel 0.001. The method was rapid and simple and the method recovery and precision were 96% ~ 103% and 0.48% ~ 1.23%.