2-DIMENSIONAL CONDUCTOMETRIC DETECTION IN ION CHROMATOGRAPHY - POSTSUPPRESSOR CONVERSION OF ELUITE ACIDS TO A SALT

被引：20

作者：

BERGLUND, I ^{[1
]}

DASGUPTA, PK ^{[1
]}

机构：

[1] TEXAS TECH UNIV,DEPT CHEM & BIOCHEM,LUBBOCK,TX 79409

来源：

ANALYTICAL CHEMISTRY | 1992年 / 64卷 / 23期

关键词：

D O I：

10.1021/ac00047a023

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simultaneous cation/anion-exchange scheme is proposed where the effluent eluite acids from a suppressed anion chromatography system proceed through the annular channel of a dual membrane converter device composed of an anion and a cation-exchange membrane tubs. The optimum regenerants consist of LiF doped with LiOH for the cation side and LIF doped with HF (or NH4HF2) for the anion side. Sensitivity to very weak acids is far better than detection in the suppressed mode and is also improved markedly over a previously described system involving sequential ion exchange to NaOH. A model is presented for the process, and qualitative agreement to the experimental data is established. The two-dimensional information permits the estimation of the pK(a) of unknown eluites.

引用

页码：3007 / 3012

页数：6

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[1] 2-DIMENSIONAL CONDUCTOMETRIC DETECTION IN ION CHROMATOGRAPHY - POSTSUPPRESSOR CONVERSION OF ELUITE ACIDS TO A BASE [J].