离子色谱法同时测定环保型电镀抛光液中氨基磺酸和DL-苹果酸  

Simultaneous determination of sulfamic acid and DL-malic acid in environmental friendly electropolishing solution by ion chromatography

作　　者：曾小岚[1] 徐栩[1] 徐琳琳[2] 刘建华[1] 

机构地区：[1]北京航空航天大学化学与环境学院,北京100191 [2]核工业理化工程研究院,天津300180

出　　处：《冶金分析》2009年第4期37-40,共4页Metallurgical Analysis

摘　　要：采用Metrosep A Supp5150阴离子分离柱,以3.2mmol/L Na2CO3-1.0mmol/L NaHCO3为淋洗液,氨基磺酸和DL-苹果酸可得到很好的分离,使用离子色谱为检测手段可实现环保型电镀抛光液中氨基磺酸和DL-苹果酸的同时测定。两者的线性范围分别为1.6～175mg/L和3.2～175mg/L;检出限分别为0.4mg/L和0.8mg/L;相对标准偏差分别小于1.1%和0.9%(n=9);氨基磺酸的加标回收率在97%～103%之间,DL-苹果酸的加标回收率在93%～105%之间。方法用于新型电镀抛光液中氨基磺酸和DL-苹果酸的同时测定,具有很好的实用性。对实现抛光液中氨基磺酸和DL-苹果酸的在线监测具有实际意义。The simultaneous determination of sulfamic acid and DL-malic acid in environmental friendly electropolishing solution by ion chromatography was described. Sulfamic acid and DL-malic acid were well separated by using Metrosep A Supp 5 150 anion exchange column for separation and 3.2 mmol/L Na2CO3-1. 0 mmol/L NaHCOa as eluent. A good linear relationship could be obtained in the concentrations ranged from 1.6 to 175 mg/L for sulfamie acid and from 3.2 to 175 mg/L for DL-malic acid. The detection limits of each acid were 0.4 mg/L and 0.8 mg/L, respectively. The relative standard deviation were less than 1.1% for sulfamic acid and 0.9% for DL-malic acid（n = 9）. The standard addition recovery of sulfamic acid was 97%-103% and that of DL-malic acid was 93%- 105% The proposed method is of high practicability in on-line determination of sulfamic acid and DL-malic acid in electropolishing solution.

关 键 词：离子色谱 电镀抛光液 氨基磺酸 DL-苹果酸 

分 类 号：TQ153[化学工程—电化学工业]