基体分离-电感耦合等离子体发射光谱法测定高纯银中21种杂质元素  

Determination of 21 impurity elements in high purity silver by matrix separation-inductively coupled plasma optical emission spectrometry

作　　者：那勃[1] 孟建华[1] Na Bo;Meng Jianhua(Tianjin Product Quality Inspection Technology Research Institute,National Testing Center for Gold and Silver Jewelry(Tianjin),Tianjin 300384,China)

机构地区：[1]天津市产品质量监督检测技术研究院,国家金银饰品质量监督检验中心(天津),天津300384

出　　处：《化学分析计量》2021年第9期30-33,共4页Chemical Analysis And Meterage

基　　金：天津市市场质量监督管理委员会科技计划项目(2020-W18)。

摘　　要：建立了基体分离-电感耦合等离子体发射光谱法测试高纯银中21种杂质元素的分析方法。采用硫氰酸钾作为沉淀剂分离银基体,滤液经定容后,用电感耦合等离子体发射光谱进行测试。21种杂质元素的质量浓度在0~4.0μg/mL范围内与光谱强度呈良好的线性关系,线性相关系数均大于0.992,检出限为0.0001~0.0214 mg/L。加标量为0.5、1.0、2.0 mg/L时,测定结果的相对标准偏差(n=6)分别为0.35%~1.96%、0.41%~2.54%、0.32%~2.07%,平均加标回收率分别为81.5%~109.6%、80.0%~108.6%、81.2%~116.8%。该方法适用于高纯银中21种杂质元素的测定。A matrix separation-inductively coupled plasma optical emission spectrometry(ICP-OES)method for the determination of 21 kinds of impurity elements in high purity silver was established.Silver matrix was separated by potassium thiocyanate as precipitant,the filtrate was tested by ICP-OES after constant volume.The mass concentration of 21 kinds of elements had good linear relationships with spectral intensity in the linear range of 0-4.0μg/mL with correlative coefficients were more than 0.992,the detection limits were 0.0001-0.0214 mg/L.Under the 3 spiked levels of 0.5,1.0,2.0 mg/L,the relative standard deviations(n=6)were 0.35%-1.96%,0.41%-2.54%,0.32%-2.07%,respectively,the average recoveries were 81.5%-109.6%,80.0%-108.6%,81.2%-116.8%,respectively.The method was suitable for the determination of 21 kinds of elements in high purity silver.

关 键 词：电感耦合等离子体发射光谱法 高纯银 基体分离 硫氰酸钾 

分 类 号：O657.3[理学—分析化学]