Silver Amalgam Tubular Detector Combined with Platinum Auxiliary Electrode for Electrochemical Measurements in Flow Systems

Oksana Josypčuk, Jiří Barek, Bohdan Josypčuk

Research output: Contribution to journalArticle

Abstract

A new type of tubular detector with platinum auxiliary electrode inside the silver amalgam tube (TD+AuxE) was proposed, fabricated, tested and compared with a typical silver amalgam tubular detector developed earlier. Non-stop-flow differential pulse voltammetric anodic stripping method (AS-DPV) and amperometric method in a glucose oxidase biosensor arrangement were tested. Both detectors were applied for AS-DPV detection in flow systems for the first time. Solutions of zinc and cadmium cations were used as the testing species for voltammetry, and detection of oxygen concentration was used for amperometry. All these experiments require application of highly negative potentials, which is possible to realize with detectors made of silver solid amalgam. The proposed combination of TD+AuxE provides a much greater current response than the arrangement with three individual electrodes. All relevant parameters were optimized for the developed TD+AuxE. The simple and fast measuring protocol for the determination of the zinc content in commercial food supplement tablets has been developed.

Original languageEnglish
JournalElectroanalysis
DOIs
Publication statusPublished - 1 Jan 2019
Externally publishedYes

Fingerprint

Mercury amalgams
Platinum
Silver
Detectors
Electrodes
Zinc
Glucose Oxidase
Glucose oxidase
Voltammetry
Cadmium
Biosensors
Tablets
Cations
Positive ions
Oxygen
Testing
Experiments

Keywords

  • amperometry
  • Flow analysis
  • silver amalgam
  • tubular detector
  • voltammetry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Cite this

Silver Amalgam Tubular Detector Combined with Platinum Auxiliary Electrode for Electrochemical Measurements in Flow Systems. / Josypčuk, Oksana; Barek, Jiří; Josypčuk, Bohdan.

In: Electroanalysis, 01.01.2019.

Research output: Contribution to journalArticle

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