File(s) under permanent embargo
Simultaneous ion-exclusion chromatrography and cation-exchange chromatography of anions and cations in environmental water samples on a weakly acidic cation-exchange resin by elution with pyridine-2,6-dicarboxylic acid
journal contribution
posted on 2023-05-16, 12:57 authored by Ding, MY, Tanaka, K, Hu, W, Hasebe, K, Paul HaddadPaul HaddadA non-suppressed conductivity detection ion chromatographic method using a weakly acidic cation-exchange column (Tosoh TSKgel OApak-A) was developed for the simultaneous separation and determination of common inorganic anions (Cl–, NO3– and SO42-) and cations (Na+, NH4+, K+, Mg2+ and Ca2+). A satisfactory separation of these anions and cations on the weakly acidic cation-exchange column was achieved in 25 min by elution with a mixture of 1.6 mmol L–1 pyridine-2,6-dicarboxylic acid and 8.0 mmol L–1 18-crown-6 at flow rate of 1.0 mL min–1. On this weakly acidic cation-exchange resin, anions were retained by an ion-exclusion mechanism and cations by a cation-exchange mechanism. The linear range of the peak area calibration curves for all analytes were up to two orders of magnitude. The detection limits calculated at S/N = 3 ranged from 0.25 to 1.9 µmol L–1 for anions and cations. The ion-exclusion chromatography–cation-exchange chromatography method developed in this work was successfully applied to the simultaneous determination of major inorganic anions and cations in rainwater, tap water and snow water samples.
History
Publication title
AnalystVolume
126Issue
5Pagination
567-570ISSN
0003-2654Department/School
School of Natural SciencesPublisher
Royal Society of ChemistryPlace of publication
Cambridge, UKRights statement
Copyright © 2001 Royal Society of ChemistryRepository Status
- Restricted