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Title of Journal: Microchim Acta

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Abbravation: Microchimica Acta

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Springer Vienna

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DOI

10.1016/0378-5955(90)90169-P

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1436-5073

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A novel antiinterference and pHmodulation device

Authors: Yuhua Su Rongzong Hu Weixiong Huang Kangkang Hu
Publish Date: 2010/12/21
Volume: 173, Issue: 1-2, Pages: 19-26
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Abstract

We report on a novel antiinterference and pHmodulation device herein after referred to as “device” It is based on electrodialysis and can continuously increase the pH value of the carrier solution and at the same time remove interfering analytical signals obtained for ascorbic acid AA and uric acid UA The “device” was coupled to the FIAamperometric detection of glucose The linear range is from 1 μmol L−1 to 04 mmol L−1 with a sensitivity of 213 μA cm−2 mM−1 and a detection limit of 1 μmol L−1 at a signaltonoise ratio of 3 The method was used to sucessfully determine glucose in serum This study represents a novel technique for overcoming analytical interference and is expected to find applications in liquid chromatography for example in online pHmodulation if different pH values are needed for separation and detectionAs shown in the figure a specific electrolytic current was applied between the two electrodes Thus H2O in the cathode chamber was electrolyzed to produce H2 and OH Then the OH moved through the anion exchange membrane and got into the packed column by electromigration where it mixed with the carrier solution of Na2SO4 Meanwhile the SO 4 2 of the carrier solution moved through the other anion exchange membrane and entered the anode chamber Therefore the carrier solution of Na2SO4 was partly converted into NaOH after passing through the “device”

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