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采用HNO3-HF-HCl酸体系消解样品,火焰原子吸收光谱法连续测定非金属材质仿真饰品中的铅、镉和镍。优化了仪器工作参数和消解条件,进行了共存离子的干扰试验。方法检出限分别为铅5.7 mg/kg、镉0.3 mg/kg、镍3.5 mg/kg。实际样品测定的相对标准偏差(n=6)为1.6%～5.2%,回收率为86.0%～105.8%。
The sample was digested with HNO3-HF-HCl acid system, and the lead, cadmium and nickel in non-metallic imitation jewelry were determined by flame atomic absorption spectrometry. The working parameters of the instrument and the digestion conditions were optimized, and interference experiments of coexisting ions were carried out. The detection limits were 5.7 mg / kg for lead, 0.3 mg / kg for cadmium and 3.5 mg / kg for nickel, respectively. The relative standard deviations (n = 6) of the actual samples were 1.6% -5.2% and the recoveries were 86.0% -105.8%.