偏硼酸锂碱熔-电感耦合等离子体发射光谱法测定透辉石中的SiO2、CaO、MgO、Al2O3、Fe2O3

Determination of SiO2、CaO、MgO、Al2O3、Fe2O3 in Diopside by Inductively Coupled Plasma Atomic Emission Spectrometry with Lithium Metaborate Fusion Sample Pretreatment

中文关键词:  偏硼酸锂  电感耦合等离子体原子发射光谱法  透辉石  SiO₂  CaO  MgO  Al₂O₃  Fe₂O₃

英文关键词:lithium metaborate  ICP-AES  diopside  SiO₂  CaO  MgO  Al₂O₃  Fe₂O₃

中文摘要:

      采用偏硼酸锂熔样，电感耦合等离子体原子发射光谱（ICP-AES）内标法同时测定透辉石中的SiO₂、CaO、MgO、Al₂O₃、Fe₂O₃.选择合适的分析谱线，采用基体匹配和背景校正等方式有效消除了测定的干扰.试验结果表明，方法各组分的相关系数良好（r≥0.999 5），检出限分别为0.061%（SiO₂）、0.039%（CaO）、0.024%（MgO）、0.011%（Al₂O₃）、0.009%（Fe₂O₃），精密度高（RSD<5%），回收率为99.0%~101.8%.所建方法应用于透辉石实际样品的测定，结果与外检实验室化学分析方法的测定结果基本一致.

英文摘要:

      Lithium metaborate fusion pretreatment and inductively coupled plasma atomic emission spectrometry(ICP-AES) with internal standard method were used for the determination of SiO₂、CaO、MgO、Al₂O₃、Fe₂O₃ in diopside. The best analytical lines of the elements were determined. The interferences were eliminated by using matched matrix and background correction. The experimental results showed a good linear relationship with the linear correlation coefficient(r ≥ 0.999 5),the detection limits of the elements were 0.061%(SiO₂),0.039%(CaO),0.024%(MgO),0.011%(Al₂O₃),0.009%(Fe₂O₃),the precision of RSD were less than 5%,the recovery rates were in the range of 99.0%~101.8%. The proposed method was applied for the determination of real samples of diopside,and the results were basically consistent with those obtained by chemical analysis methods in other laboratories.