摘要
在００８～０１０ｍｏｌ／ＬＨＣｌ介质中，溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，Ｚｒ（Ⅳ）与５′＿硝基水杨基荧光酮（５′＿ＮＳＦ）发生显色反应，形成１∶４的桔红色络合物，λｍａｘ＝５４０ｎｍ，ε为１４６×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ｚｒ（Ⅳ）含量在０～０５ｍｇ／Ｌ符合比尔定律。方法用于氧化铝及陶瓷釉料中锆的测定，结果与ＩＣＰ＿ＡＥＳ法相符，ＲＳＤ（ｎ＝５）在１３％～３７％。
In the present of CTMAB, zirconium(Ⅳ) reacts with 5′_nitrosa￣licyl_fluorone (5′_NSF) and forms a molar ratio of 1∶4 orange_red complex. The maximum absorption of the complex is at 540 nm and the molar absorptivity is 1.46×10 5 L·mol -1 ·cm -1 . Beer′s laws obeyed in the range of 0～0.5 mg/L for Zr(Ⅳ). A spectrophotometric method based on this chromogenic reaction has been applied to the determination of zirconium in procelain glaze and fused cast refractory Al 2O 3. The results are in good agreement with those provided by ICP_AES with precision of 1.3%～ 3.7% RSD( n =5).
出处
《岩矿测试》
CAS
CSCD
北大核心
1997年第3期238-240,共3页
Rock and Mineral Analysis
基金
山东省分析测试协会基金
关键词
锆
5'-硝基水杨基
荧光酮
显色反应
zirconium, 5′_nitrosalicyl_fluorone (5′_NSF), cetyltrimethylammonium bromide(CTMAB), spectrophotometry
