碱熔分解-基体匹配-电感耦合等离子体原子发射光谱法测定含铱催化剂中的铱  

Determination on Iridium in Iridium-containing Catalyst by Decomposition by Alkali Fusion-Matrix Matching-Inductively Coupled Plasma Atomic Emission Spectrometry

作　　者：方海燕 杨晓滔 安中庆 范兴祥 毛莹博 FANG Hai-yan;YANG Xiao-tao;AN Zhong-qing;FAN Xing-xiang;MAO Yin-bo(Sino-platinum Testing Technology(Yunnan)Co.,Ltd.,Sino-platinum Metals Co.,Ltd.,Kunming,Yunnan 650106,China;School of Chemistry and Resources Engineering,Honghe Uiversity,Mengzi Yunnan 661199,China;Engineering Research Center for Clean Extraction and High Value of Waste Precious Metal Catalysts of Yunnan Province Higher Education Institutions,Mengzi Yunnan 661199,China;China Renewable Resources Industry Technology Innovation Strategic Alliance"Joint Innovation Laboratory for Recycling Waste Precious Metals Catalyst",Mengzi,Yunnan 661199,China;Honghe Vocational and Technical College,Mengzi,Yunnan 661100,China)

机构地区：[1]贵研铂业股份有限公司贵研检测科技(云南)有限公司,云南昆明650106 [2]红河学院,化学与资源工程学院,云南蒙自661199 [3]云南省高校失效贵金属催化剂清洁提取与高值化工程研究中心,云南蒙自661199 [4]中国再生资源产业技术创新战略联盟“失效贵金属催化剂循环利用联合创新实验室”,云南蒙自661199 [5]红河职业技术学院,云南蒙自661100

出　　处：《云南冶金》2022年第3期149-152,共4页Yunnan Metallurgy

基　　金：国家重点研发计划项目(项目编号:SQ2020YFF0404678)资助。

摘　　要：建立准确测定含铱催化剂中铱含量的方法,是保障含铱催化剂贵金属高效回收、考察含铱催化剂湿法冶金生产物料平衡的重要技术方法,对保证含铱催化剂买卖双方公平、公正交易具有重要的意义。本法采用碱熔分解含铱催化剂样品,加入基体配制铱标准溶液与待测试样进行基体匹配,运用ICP-AES法测定含铱催化剂中铱含量。实验结果表明:少量定量加入过氧化钠能完全分解样品,采用标准基体匹配方法可消除干扰,Ir校准曲线的线性范围为(0.50~25.00)μg/mL,校准曲线线性相关系数分别为0.99995,方法检出限为2.4μg/g。铱的测定范围为(100~5000)g/t,结果相对标准偏差(RSD,n=11)为0.2%~3.6%,加标回收率为96%~108%。本法测定铱催化剂样品中铱的结果与国标方法GB/T17418.4-2010的测定值均基本一致。An accurate determination method of iridium content in iridium catalyst is established,it is an important technical method to ensure efficient recovery of precious metal in iridium-containing catalyst and to investigate material balance in hydrometallurgical production of iridium catalyst.It is of great significance to ensure the fair and just trade between buyers and sellers of iridium catalyst.In this method,the sample of iridium-containing catalyst was decomposed by alkali fusion,and the matrix was added to the matrix to prepare iridium standard solution to match the matrix with the sample to be tested.The iridium content in the iridium catalyst was determined by ICP-AES method.The experimental results show that adding a small amount of sodium peroxide can completely decompose the sample,and the interference can be eliminated by using the standard matrix matching method,the linear range of Ir calibration curves is(0.50~25.00)μg/mL,and the linear correlation coefficients of calibration curves is 0.99995,respectively.The limit of detection was 2.4μg/g.Iridium was determined in the range of(100~5000)g/t with relative standard deviation(RSD,n=11)of 0.2%~3.6%.The adding standard recovery rate were 96%~108%.The results of determination of iridium in the sample of iridium catalyst by this method are basically consistent with those determined by GB/T17418.4-2010.

关 键 词：铱 碱熔 含铱催化剂 电感耦合等离子体原子发射光谱法 

分 类 号：O657.4[理学—分析化学]