分光光度间接法测定微量锑的研究  

Study on the Spectrophotometric Indirect Determination of Microamount of Antimony

作　　者：黄典文[1] 梁志启 

机构地区：[1]广东工业大学化学工程系

出　　处：《广东工业大学学报》1997年第2期53-55,共3页Journal of Guangdong University of Technology

摘　　要：研究了在０．５～２．０ｍｏｌ／ＬＨ２ＳＯ４介质中，过量Ｃｅ（Ⅳ）存在下，Ｓｂ（Ⅲ）被完全氧化成为Ｓｂ（Ⅴ），余下的Ｃｅ（Ⅳ）氧化有机试剂联邻甲苯胺使之显色，显色的程度随Ｓｂ（Ⅲ）量的增加而呈线性降低，借此建立了分光光度间接测定Ｓｂ的新方法．最大吸收波长为４４０ｎｍ，表观摩尔吸光系数为１．７５×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，Ｓｂ量在０～２ｍｇ／Ｌ范围服从比尔定律．方法简单、快速、选择性好，在用于矿样中微量Ｓｂ的测定时，结果满意．The antimony (Ⅲ) is axidized by excesive Ce(Ⅳ) in H 2SO 4 medium, and the remaining part Ce(Ⅳ) can oxide orthotoluidine to form a yellow solution. The degree of colour development of solution is in inverse proportion to the amount of antimony. The wavelength of maxium absorptivity is at 440nm, and its apparent molar absorptivity is 1.75×10 4L·mol -1 ·cm -1 .Beer′s Law is obeyed from 0 to 2mg/L of antimony. This method is satisfactorily used for the determination of microamount of antimony in ore.

关 键 词：锑 分光光度法 矿样 

分 类 号：O653[理学—分析化学]