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Potentiometric Detection of Metal Ions Separated by Liquid Chromatography Using a Tungsten Oxide Electrode
journal contribution
posted on 2023-05-16, 10:57 authored by Chen, ZL, Alexander, PWThe use of a tungsten oxide sensor for the potentiometric detection of metal ions separated by liquid chromatography is described. Separation of metal ions such as Fe3+, Fe2+, Cu2+ and Pb2+ was performed by ion chromatography using a mobile phase containing 25 mM sodium tartrate/2 mM ethylenediamine at pH 3.8. Calibration plots were linear in the range 0.5 to 3.5 mM. Potentiometric detection was also applied to ion-interaction chromatography. The results showed that separation of metal ions was improved and the detection limits for the test metals in the range of 0.5-5 nmol were obtained in the presence of sodium citrate/1-octanesulfonic acid at pH 3.0. The potentiometric detection described in this article is shown to have advantages in terms of low cost, simplicity and sensitivity.
History
Publication title
ElectroanalysisVolume
9Issue
11Pagination
818-821ISSN
1040-0397Department/School
University CollegePublisher
VCH Verlagsgesellschaft mbHPlace of publication
WeinheimRepository Status
- Restricted