直流辉光放电发射光谱共线法测定钢铁中硼含量

应用直流辉光放电发射光谱仪,实现生铁、铸铁、不锈钢、中低合金钢材料中硼含量的共线法测定。实验选择磨床进行试样制备，采用单因素轮换法优化激发参数。以铁元素为基体元素来消除不同材质的基体效应，并进行钼元素的光谱干扰校正。实验优化分析参数为放电电压1 200 V，放电电流50 mA，预溅射时间50 s，积分时间10 s，钼元素光谱干扰校正系数为-0.007 9。硼含量分析范围0.000 6％～0.080％，测量结果与认定值一致，相对标准偏差不大于3%。

Direct current glow discharge emission spectrometric co-linear method for the determination of boron content in iron and steel

The co linear determination of boron in pig iron, cast iron, stainless steel and low medium alloy steel materials was realized using direct current glow discharge emission spectrometer. The sample was prepared using grinding machine. The excitation parameters were optimized with single factor alternation method. The matrix effect of different materials was eliminated using iron as matrix element. The spectral interference of molybdenum was corrected. The optimized analytical parameters were as follows: discharge voltage, 1 200 V; discharge current, 50 mA; pre sputtering time, 50 s; integration time,10 s; correction coefficient for spectral interference of molybdenum,-0.007 9. The analytical range of boron was 0.000 6 ％ 0.080 ％. The determination results were consistent with the certified values. The relative standard deviation (RSD) was smaller than 3 %.