采用电感耦合等离子体原子发射光谱法测定钨钢中硅、锰、磷、铬、镍、铜、钼、钒和钨的含量。试样用盐酸、柠檬酸铵、硝酸溶解。基体效应采用基体匹配法消除。硅、锰、磷、铬、镍、铜、钼、钒、钨的分析谱线依次为288.158,257.610,177.495,267.716,213.604,327.396,204.598,310.230,239.709 nm。9种元素的质量分数在一定的范围内与其发射强度呈线性关系,方法的检出限(3s)在0.000 3%~0.004 8%之间。方法用于两种标准物质的测定,测定结果与认定值相符,测定值的相对标准偏差(n=5)在0.74%~2.1%之间。方法的回收率在95.0%~107%之间。

ICP-AES was applied to the determination of Si, Mn, P, Cr, Ni, Cu, Mo, V and W in tungsten steel. The sample was dissolved with HCl, ammonium citrate and HNO3. The matrix effect was removed with matrix matching method. Analytical spectral lines of 288.158, 257.610, 177.495, 267.716, 213.604, 327.396, 204.598, 310.230 and 239.709 nm were chosen for the determination of Si, Mn, P, Cr, Ni, Cu, Mo, V and W respectively. Linear relationships between values of emission intensity and mass fraction of the 9 elements were kept in definite ranges, with detection limits (3s) in the range of 0.000 3%-0.004 8%. The proposed method was applied to the analysis of 2 standard samples, giving results in consistency with the certified values with RSD (n=5) in the range of 0.74%-2.1%. Values of recovery of the method were found in the range of 95.0%-107%.