电感耦合等离子体原子发射光谱法测定钴铬钨合金中钨镍铁钒
Metallurgical Analysis(2018)
Abstract
采用盐酸、硝酸溶解样品,再加硫磷混酸冒烟,冒烟期间滴加硝酸使碳化物完全溶解,采用基体匹配法配制标准溶液系列消除基体效应的影响,选择 W 207.911 nm、Ni 231.604 nm、Fe 259.940 nm、V 311.071 nm为分析线,使用电感耦合等离子体原子发射光谱法(ICP-A ES)测定钴铬钨合金中钨、镍、铁、钒.钨的质量分数在0.1% ~30% 范围内,镍、铁、钒的质量分数在0.1% ~10% 范围内各元素质量分数与对应的发射强度呈线性,校准曲线线性相关系数不小于0.9997;方法中各元素检出限为0.0008% ~0.0033%(质量分数).按照实验方法测定两个钴铬钨合金中钨、镍、铁、钒,结果的相对标准偏差(RSD,n=6)为1.0% ~1.9%;并与微波消解-电感耦合等离子体原子发射光谱法的测定结果进行对比,测定结果基本一致.
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Key words
iron,vanadium,tungsten,cobalt chromium tung-sten alloy,nickel,key words:inductively coupled plasma atomic emission spectrometry(ICP-AES)
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