内标控制-ICP-AES法测定镍铂合金中铂含量  

Internal standard control-determination of platinum content in Ni-Pt alloy by ICP-AES

作　　者：赵万春 李秋莹 孙祺 赵文虎 杨辉 ZHAO Wanchun;LI Qiuying;SUN Qi;ZHAO Wenhu;YANG Hui(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Sino-Platinum Metals Co.Ltd.,Sino-Platinum Metals Testing Technology(Yunnan)Co.Ltd.,Kunming 650106,China)

机构地区：[1]贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室,贵研检测科技(云南)有限公司,昆明650106

出　　处：《贵金属》2023年第S01期138-141,共4页Precious Metals

基　　金：国家标准制定任务(20213153-T-610)。

摘　　要：镍铂合金中铂含量的准确测定是生产物料金属平衡考察和交易中的重要指标,以往常采用稀释后用ICP-AES进行测定,但是该法稀释过程易引入误差。采用钇内标测定控制,试样以盐酸-硝酸溶解后,在15%的盐酸介质中,用ICP-AES法测定镍铂合金中铂含量。对谱线选择,基体镍的影响,仪器最佳测定条件等进行实验,建立了一种ICP-AES法准确测定镍铂合金中铂含量的方法。方法的检出限(μg/mL)为0.029(Pt 204.937)、0.046(Pt 299.797)、0.035(Pt 265.945),测定范围为:1.0%~15.0%,加标回收率为:99.1%~101.6%,相对标准偏差(RSD)<1%。方法准确、快速、简便。结果与滴定法测定的结果吻合。Accurate determination of platinum content in nickel-platinum alloy.It is an important index in material balance inspection and trade.In the past,diluted Inductively coupled plasma atomic emission spectroscopy were used,but the dilution process of this method is easy to introduce error.Yttrium internal standard measurement control.The sample was dissolved by hydrochloric acid and nitric acid,in 15%hydrochloric acid medium.The method of Accurate determination of platinum content in Ni-Pt alloy target by ICP-AES is established.the influencing factors,including the line selection,effect of matrix nickel,instrument determination conditions,were been experimented.The detection limits(μg/mL)of the method were 0.029 for(Pt 204.937),0.046 for(Pt 299.797),0.035 for(Pt 265.945).The determination levels of the platinum in the range from 1.00%to 15.00%.The standard recoveries are from 99.1%to 101.6%,RSD<1%.The method is accurate,fast and simple.The results were in good agreement with those obtained by Titrimetric determination.

关 键 词：内标控制 电感耦合等离子体原子发射光谱法(ICP-AES) 镍铂合金 铂 

分 类 号：O657.31[理学—分析化学]