山东科学2017，Vol.30Issue(4)：92-98,7.DOI:10.3976/j.issn.1002-4026.2017.04.015
离子色谱法同时测定环境样品中有机酸的研究
Simultaneous determination of formic acid, acetic acid,propionic acid and n-butyric acid in environmental samples by ion chromatography
孙芸芸 1于帅 2栾玲玉 1李剑 1丁尚志 1王丽娟 1赵艳荣1
作者信息
- 1. 山东省分析测试中心,山东 济南250014
- 2. 华南理工大学化学与化工学院,广东 广州510641
- 折叠
摘要
Abstract
A method for simultaneous determination of formic acid, acetic acid, propionic acid and n-butyric acid in water sample by ion chromatography was established.The chromatographic instrument used was a Thermo Fisher ICS-5000+ ion chromatograph.An inhibitory conductance detector, Ion Pac AS11-HC (250 mm×4 mm I.D.) separation column and Ion Pac AG11-HC (50 mm×4 mm I.D.) guard column were used.The temperature of detector and columns were 35 ℃ and 30 ℃, respectively.Gradient elution was conducted with KOH as eluent and the gradient elution conditions were as followings: the concentration of KOH was 1.0 m mol/L at 0 ~17.0 min, 30.0 m mol/L at 17.1~25.0 min, and 1.0 m mol/L at 25.1~30.0 min.When the flow rate was 1.2 ml/min, formic acid, acetic acid,propionic acid and n-butyric acid could meet the requirements of separation, and the detection limit was 0.004, 0.005, 0.004 and 0.005 mg/L, respectively.The four organic acid showed good linear correlation in the range of 0.2 mg/L~3.0 mg/L, and its correlation coefficients was within 0.999 1~0.999 5.Two mixed standard solutions of 0.2 and 1.0 mg /L were detected 11 times and the results showed that the relative standard deviation of formic acid, acetic acid, propionic acid and butyric acid were all less than 2%, and the precision was better.The spike recovery of formic acid, acetic acid, propionic acid and butyric acid ranging from 95.3% to 98.7% was obtained when applying this method to analyze the four organic acids in water samples.关键词
离子色谱/有机酸/精密度/回收率Key words
ion chromatography/organic acid/precision/rate of recovery分类
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孙芸芸,于帅,栾玲玉,李剑,丁尚志,王丽娟,赵艳荣..离子色谱法同时测定环境样品中有机酸的研究[J].山东科学,2017,30(4):92-98,7.
