Simultaneous determination of 8 elements in automotive interior plastic parts by microwave digestion-ICP-OES
CHEN Yong, ZHU Zhongju, WANG Xuewu, QI Gongwei, CHU Junwei, YING Huijuan, HU Chengqun
Jinhua Academy of Metrology and Quality Science, Jinhua 321000, China
摘要：建立微波消解-电感耦合等离子体发射光谱法同时测定汽车内饰塑料件中As，Ba，Cd，Cr，Hg，Pb，Sb，Se 8种元素含量的分析方法。以HNO3-H2O2-HF(体积比为4∶1∶0.5)混合酸溶液为消解液，按设定的微波消解条件对样品进行消解，在优化的仪器工作条件下进行测定。8种元素在各自的质量浓度范围内与特征光强值具有良好的线性关系，相关系数均大于0.999，方法检出限为1.1～15.4 μg/L。测定结果的相对标准偏差为0.88%～4.75%(n=6)，样品加标回收率为93.5%～102.1%。该方法简便、快速、测定结果准确，适用于汽车内饰塑料件中As，Ba，Cd，Cr，Hg，Pb，Sb，Se元素的同时测定。
Abstract：A method for the simultaneous determination of 8 heavy metal elements of As, Ba, Cd, Cr, Hg, Pb, Sb and Se in automotive interior plastic parts by microwave digestion-inductively coupled plasma atomic emission spectrometry was established. The sample was digested under the set microwave digestion conditions with HNO3-H2O2-HF(volume ratio was 4∶1∶0.5) mixed acid solution, and the determination was carried out under the optimized working conditions of the instrument. The mass concentration of the eight elements had a good linear relationship with the characteristic light intensity in their respective range, the correlation coefficients were all more than 0.999, and the detection limits were 1.1-15.4 μg/L.
The relative standard deviations of the determination results were 0.88%-4.75%(n=6), and the recoveries were 93.5%-102.1%. The method is simple, rapid and accurate, which is suitable for the simultaneous determination of As, Ba, Cd, Cr, Hg, Pb, Sb and Se in plastic parts of automobile interior.
Keywords：microwave digestion; ICP-OES; automotive interior; heavy metal
CHEN Y，ZHU Z J，WANG X W，et al. Simultaneous determination of 8 elements in automotive interior plastic parts by microwave digestion-ICP-OES[J]. Chemical analysis and meterage，2020，29(6)：19-22.