直流辉光放电发射光谱共线法测定钢铁中硼含量

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

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 200V,放电电流50mA,预溅射时间50s,积分时间10s,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%。

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 %.