采用多样品引入系统HG-ICP-AES法测定汽轮机材料中砷、铋、锑元素

Determination of As,Bi and Sb of Turbine Material Using Multimode Sample Introduction System HG-ICP-AES Method

在多样品引入系统(MSIS)中,选择砷谱线波长193.696nm,铋谱线波长223.061nm,锑谱线波长217.582nm作为分析线,用试验方法探讨了介质酸度、硼氢化钾浓度、射频发生器(RF)功率等对最终测定结果的影响,从而实现了使用电感耦合等离子体发射光谱法测定汽轮机用钢铁材料中微量元素砷、铋、锑的过程。在选定的仪器工作条件下,各元素的校准曲线线性相关因数均大于0.9990,各元素的检出限为0.00036%~0.00059%。将该试验方法用于标准样品中砷、铋、锑的测定,结果的相对标准偏差(RSD,n=6)为2.66%~8.21%,测定值与认定值基本吻合。研究成果可为汽轮机钢铁材料中微量元素砷、铋、锑化学成分测试提供参考。

In the multimode sample introduction system (MSIS),the spectral line wave lengths of 193.696 nm, 223.061 nm and 217.582 nm respectively corresponding to As, Bi and Sb were selected as analysis lines. The effects of medium acidity, potassium borohydride concentration and RF power on the final determination results were discussed experimentally. Thus, the determination of As, Bi and Sb in turbine material was realized using inductively coupled plasma atomic emission spectrometry. Under the selected working conditions of the instrument, the linear correlation factors of calibration curves on each element were above 0.999 0, and the detection limits of each element were 0.000 36%-0.000 59%. The experimental method was applied to the determination of As, Bi and Sb in standard samples, and the relative standard deviation (RSD, n=6) of the results was 2.66%-8.21%, which showed that the measured values were basically in agreement with the certified values. The research results can provide reference for the determination of As, Bi and Sb in turbine material.