电感耦合等离子体发射光谱法测定18K金中铅元素的谱线选择

Selection of Spectral Lines for Determination of Lead in 18K Gold by Inductively Coupled Plasma Optical Emission Spectrometry

18K金中可能含有多种杂质元素,如铜和铅.常用的光谱分析方法中,铅元素测试谱线易被铜、铁和金等元素干扰.建立了基于电感耦合等离子体原子发射光谱法(ICP-OES)测定18K金中铅含量的方法.测试结果表明,在283.306 nm谱线下,铅元素在标准曲线浓度范围内呈良好线性关系.方法检出限为0.0056μg/mL,加标回收率在92.9%~102.0%之间,相对标准偏差小于1%.采用283.306 nm谱线测试结果准确,灵敏度高,适用于测试18K金中铅元素含量.

18K gold may contain many impurity elements,such as copper and lead.However,the common spectrum of lead element is easily interfered by copper,iron and gold in the spectral analysis.A method based on the inductively coupled plasma optical emission spectrometry(ICP-OES)for the determination of the content of lead in 18K gold was been established.The results showed that the linear relationship of lead in the concentration range of standard curve was good at 283.306 nm.The detection limit was 0.0056μg/mL,the recovery rate was 92.9%~102.0%,and the relative standard deviation was less than 1%,receptivity.The results of spectral line test were accurate and sensitive,283.306 nm line is suitable for the determination of lead in 18K gold.