背景扣除光谱干扰-单道扫描电感耦合等离子体原子发射光谱法测定高合金钢中磷

发布时间：2018-04-29 00:01

本文选题：背景扣除 + 单道扫描　；参考：《冶金分析》2015年10期

【摘要】：利用单道扫描型电感耦合等离子体原子发射光谱仪(ICP-AES)的高分辨率及步进扫描功能,精确定位选择背景扣除点,有效消除了Cu 213.597nm、Fe 213.592nm谱线对P 213.618nm分析谱线的严重尾翼干扰和铬、镍、钼等元素的背景增强影响。对比了P 213.618nm作为分析谱线和充高纯氮气、P 178.229nm作为分析谱线的测定结果,发现采用P 213.618nm作为分析谱线测定结果的精密度更好。按照实验方法测定高合金中磷,无须对铬、镍、钼、铜等元素进行基体匹配,也不必使用干扰因子校正法消除铜的影响,并且使用同条铁基校准曲线,能同时进行低合金钢和高合金钢中微量磷的测定。磷校准曲线的线性相关系数r=0.999 1,方法可以测定高合金钢中质量分数低至0.002%的磷。按照实验方法测定高合金钢标准样品中磷,测定值与认定值一致。测定高合金钢中质量分数为0.006 8%的磷,测定结果的相对标准偏差(RSD,n=10)小于4%。
[Abstract]:By using the high resolution and stepwise scanning function of ICP-AES, the background subtraction points are accurately located and selected, which effectively eliminates the serious tail interference and chromium, nickel caused by Cu 213.597 nm Fe 213.592nm line to the P 213.618nm analytical line, and the results show that the high resolution and step scanning function of ICP-AESs can effectively eliminate the interference of Cu 213.597 nm Fe 213.592nm line to the P 213.618nm analysis line. Background enhancement of molybdenum and other elements. The results of P 213.618nm as analytical lines and P 178.229nm with high purity nitrogen as analytical lines were compared. It was found that the precision of using P 213.618nm as analytical lines was better. In order to determine phosphorus in high alloy according to the experimental method, there is no need for matrix matching of chromium, nickel, molybdenum, copper and so on, and no interference factor correction method is necessary to eliminate the influence of copper, and the calibration curve of the same iron base is used. Trace phosphorus in low alloy steel and high alloy steel can be determined simultaneously. The linear correlation coefficient of phosphorus calibration curve is 0.999 1. The method can be used to determine phosphorus in high alloy steel whose mass fraction is as low as 0.002%. The determination of phosphorus in the standard sample of high alloy steel by the experimental method is in agreement with the determined value. The relative standard deviation for the determination of phosphorus in high alloy steel with a mass fraction of 0.006 is less than 4.
【作者单位】：宝山钢铁集团中央研究院;
【分类号】：TG115.33

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