异辛烷溶解-直接进样-电感耦合等离子体发射光谱法测定银制品涂层中8种有害元素
那勃，汪琳，张少强，王伟
1. 天津市产品质量监督检测技术研究院，国家金银饰品质量检验检测中心（天津），天津 300384； 2. 华津国检（深圳）金银珠宝检验中心有限公司，广东深圳 518000
Determination of eight harmful elements in silver products coating by isooctane dissolution-direct injection-inductively coupled plasma optical emission spectrometry
NA Bo1, WANG Lin1, ZHANG Shaoqiang2, WANG Wei2
1. Tianjin Product Quality Inspection Technology Research Institute, National Testing Center for Gold and Silver Jewelry(Tianjin),Tianjin 300384, China; 2. Huajin Guojian(Shenzhen
摘要：建立电感耦合等离子体发射光谱测定银制品表层涂层中硒 、砷、锑、铅 、镉、汞、铬 、钡 8 种有害元素含量的分析方法。采用异辛烷作为浸泡溶剂，采用装载有机进样附件的电感耦合等离子体发射光谱仪对样品进行测定。 8种元素的质量分数在 0.0～5.0 mg/kg 范围内与光谱强度的线性关系良好，线性相关系数均不小于 0.999 8，检出限为0.000 2～0.034 4 mg/kg。加标质量为 0.5、2.0、4.0 mg/kg 时，测定结果的相对标准偏差分别为 0.32%～3.65%、0.41%～2.44%、0.33%～2.82%（n=6），平均加标回收率分别为 100.0%～108.9%、100.8%～108.6%、97.2%～103.8%。
Abstract：An analytical method for the determination of eight harmful elements, selenium, arsenic, antimony, lead, cadmium, mercury, chromium and barium in the surface coating of silver products by isooctane dissolution direct injection inductively coupled plasma optical emission spectrometry was established. Isooctane was used as soaking solvent, and the samples were determined by inductively coupled plasma atomic emission spectrometer with organic injection accessories. The linear relationship between mass fraction of 8 elements and spectral intensity was good in the range of 0-5.0 mg/kg, the correlation coefficients were not less than 0.999 8, the detection limits were 0.000 2-0.034 4 mg/kg. The results showed that under the three spiked levels of 0.5, 2.0 and 4.0 mg/kg, the relative standard deviations were 0.32%-3.65%, 0.41%-2.44% and 0.33%-2.82%(n=6), the recoveries rate were 100.0%-108.9%, 100.8%-108.6% and 97.2%-103.8%, respectively.
关键词：电感耦合等离子体发射光谱法；异辛烷；涂层；有害元素
Keywords：inductively coupled plasma optical emission spectrometry; isooctane; coating; harmful elements
基金：天津市市场监管委科技计划项目（2020-W18）
本文引用格式：
那勃，汪琳，张少强，等.异辛烷溶解-直接进样-电感耦合等离子体发射光谱法测定银制品涂层中8种有害元素[J].化学分析计
量，2023，32(1)：26.NA Bo，WANG Lin，ZHANG Shaoqiang，et al. Determination of eight harmful elements in silver products coating by isooctanedissolution-direct injection-inductively coupled plasma optical emission spectrometry[J]. Chemical Analysis and Meterage，2023，32(1)：26.
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