ICP-AES法测定不锈钢中高含量镍和铬的光谱干扰和校正

发布时间：2018-06-01 03:21

本文选题：电感耦合等离子体原子发射光谱法 + 不锈钢　；参考：《分析试验室》2017年02期

【摘要】：使用HNO3,HF,HCl O4溶解不锈钢样品,以Ni 231.6 nm,Cr 267.7 nm作为分析谱线,以干扰系数法校正Fe对Ni和Cr的光谱干扰,建立了ICP-AES法测定不锈钢中高含量Ni和Cr的方法。通过测定不同铁基体浓度下Ni和Cr的发射强度,考察铁基体对Ni和Cr的光谱干扰。实验结果表明:铁基体对Ni和Cr均存在光谱干扰,将实验方法用于不锈钢标准样品中Ni和Cr的测定,经光谱干扰校正后,结果与参考值吻合,测定结果的绝对误差在0.35%~0.63%间,相对标准偏差(RSD,n=6)在0.68%~1.1%间。
[Abstract]:A method for the determination of high content of Ni and Cr in stainless steel by ICP-AES method was established by using HNO _ 3H _ 2O _ 4 HCl O _ 4 as dissolved stainless steel sample, Ni 231.6 nm Cr 267.7 nm as the analytical spectral line and interference coefficient method to correct the spectral interference of Fe to Ni and Cr. The spectral interference of Ni and Cr was investigated by measuring the emission intensity of Ni and Cr at different concentrations of iron matrix. The experimental results show that the iron matrix has spectral interference on both Ni and Cr. The method has been applied to the determination of Ni and Cr in stainless steel standard samples. After correction of the spectral interference, the results are in good agreement with the reference values. The absolute error of the determination results is between 0.35% and 0.63%. The relative standard deviation was between 0.68% and 1.1%.
【作者单位】：国家轻金属质量监督检验中心;
【分类号】：TG115.33

【参考文献】