Zr-XO-CTMAB三元胶束络合体系测定铝合金中微量锆  

Determination of Micro Zirconium in Aluminium Alloy with Zr(IV)-XO-CTMABTernary Micelle Complex System

作　　者：于永丽[1] 王长杰[1] 王家瑜 

机构地区：[1]东北大学理学院化学系,沈阳110006

出　　处：《冶金分析》1999年第1期18-19,17,共3页Metallurgical Analysis

摘　　要：研究了锆与二甲酚橙（ＸＯ）和溴化十六烷基三甲基铵（ＣＴＭＡＢ）的显色反应．在ｐＨ２．２时，Ｚｒ与ＸＯ和ＣＴＭＡＢ形成稳定的紫红色三元胶束络合物，最大吸收波长为５８５ｎｍ．表观摩尔吸光系数ε＝３．６×１０~４，锆浓度在０～１．５０ｍｇ／时服从比尔定律．测得络合物中锆和二甲酚橙配位比为１：３，表观稳定常数为２．８×１０^(１５)，ＣＴＭＡＢ的ＣＭＣ约为７．８×１０^(－５)ｍｏｌ／Ｌ．应用该体系测定了铝合金标样中微量锆，相对误差为２．７％．The color reaction of zirconium (IV)with xylenol orange (XO) in the presence of cetyl trimethyl ammonium bromide(CTMAB) has been studied.At PH 2.2, Zr (IV) with XO and CTMAB forms a stable purplish red ternary complex. Themaximum absorbance is at 585nm with an apparent molar aborptivity of law is obeyed inthe range of 0-1.50mg/L for Zr(IV) It was evaluated that the molar ratio of Zr (IV) to XO in the complex was 1:3 andthe stability conStant wu 2.8×105. The edtital micelle conCentration of CFMAB was about 7.8 × 10-5mol/L. The propedmethod has ho applied to determine zirconium in aluminium alloy with the relative error of 2.7%.

关 键 词：锆 二甲酚橙 铝合金 CTMAB 测定 三元胶束络合物 

分 类 号：TG146.21[一般工业技术—材料科学与工程] O614.412[金属学及工艺—金属材料]