钴粉中钴含量的测定  

Determination of Cobalt Oxide Content in Cobalt Oxide Powder

作　　者：李静彤 LI Jingtong(China Building Material Test&Certification Group Qinhuangdao Co.,Ltd.,Qinhuangdao 066004,China)

机构地区：[1]中国建材检验认证集团秦皇岛有限公司,秦皇岛066004

出　　处：《玻璃》2023年第3期31-33,38,共4页Glass

摘　　要：介绍了一种钴粉中钴含量的测定方法。该方法以氟化物掩蔽可能共存的干扰离子,在pH=10的氨性介质中,用紫尿酸胺作指示剂,EDTA标准溶液直接滴定法测定钴含量。该方法的回收率为96%~103%,相对标准偏差为0.079%。A method for determination of cobalt oxide content in cobalt oxide powder was described.In this method,cobalt oxide content was determined by direct titration with EDTA standard solution in ammonia medium with pH=10 using murexide as indicator.The possible coexisting interfering ions are masked by adding fluoride as a masking agent.The recovery of this method is from 96%to 103%and the relative standard deviation is 0.079%.

关 键 词：钴粉 测定 EDTA容量法 

分 类 号：TQ171[化学工程—玻璃工业]