电感耦合等离子体原子发射光谱法测定铌锰铁合金中硅铝磷钽钛  

Determination of silicon,aluminum,phosphorus,tantalum and titanium in niobium-manganese-iron alloy by inductively coupled plasma atomic emission spectrometry

作　　者：张艳[1] 沈健 ZHANG Yan;SHEN Jian(Test,Analysis and Inspection Center,Baoshan Iron&Steel Co.,Ltd.,Shanghai 200941,China)

机构地区：[1]宝山钢铁股份有限公司检化验中心,上海200941

出　　处：《冶金分析》2021年第10期63-68,共6页Metallurgical Analysis

摘　　要：铌锰铁合金是炼钢和铸铁过程中的一种重要原料,准确分析铌锰铁合金中杂质元素,对炼钢和铸铁产品的质量控制具有重要意义。实验采用硝酸、氢氟酸在60℃溶解样品,选择Si 251.611nm、Al 308.215nm、P 178.222nm、Ta 268.517nm和Ti 336.122nm为分析谱线,使用电感耦合等离子体原子发射光谱法(ICP-AES)对铌锰铁合金中硅、铝、磷、钽、钛含量进行测定。共存元素的干扰校正试验表明,样品中共存元素对待测元素的干扰可忽略。各待测元素的校准曲线线性相关系数均不小于0.9998,检出限为0.0002%~0.0018%。实验方法应用于铌锰铁合金实际样品中硅、铝、磷、钽和钛的测定,测定结果的相对标准偏差(RSD,n=11)为0.53%~1.7%,加标回收率为98%~102%。使用铌铁和锰铁标准样品合成的样品解决了没有市售铌锰铁标准样品的问题,检测结果与理论值一致。Niobium-manganese-iron alloy is an important material in the process of ironmaking and cast iron.The accurate analysis of impurity elements in niobium-manganese-iron alloy is of great significance for the quality control of ironmaking and cast iron products.In experiments,the sample was dissolved with nitric acid and hydrofluoric acid at 60℃.Si 251.611 nm,Al 308.215 nm,P 178.222 nm,Ta 268.517 nm and Ti 336.122 nm were selected as the analytical lines.The contents of silicon,aluminum,phosphorus,tantalum,and titanium in niobium-manganese-iron alloy were determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The interference correction experiments of coexisting elements indicated that the interference of coexisting elements with the testing elements could be ignored.The linear correlation coefficients of calibration curves for all testing elements were not less than 0.9998.The limits of detection were between 0.0002%and 0.0018%.The proposed method was applied for the determination of silicon,aluminum,phosphorus,tantalum and titanium in niobium-manganese-iron alloy sample.The relative standard deviations(RSD,n=11)of determination results were between 0.53%and 1.7%.The recoveries were between 98%and 102%.The synthetic samples were prepared using certified reference materials of niobium-iron and manganese-iron,which solved the problem that there was no commercial standard sample of niobium-manganese-iron alloy.The found results were consistent with the theoretical values.

关 键 词：电感耦合等离子体原子发射光谱法(ICP-AES) 铌锰铁合金 硅 铝 磷 钽 钛 

分 类 号：O657.31[理学—分析化学] TF702.4[理学—化学]