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  An electrochemical calibration unit for hydrogen analysers

Merzlikin, S. V., Mingers, A. M., Kurz, D., & Hassel, A. W. (2014). An electrochemical calibration unit for hydrogen analysers. Talanta, 125, 257-264. doi:10.1016/j.talanta.2014.02.008.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-07BE-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-C2E4-D
Genre: Journal Article

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 Creators:
Merzlikin, Sergiy Vasil´ović1, 2, Author              
Mingers, Andrea M.3, Author              
Kurz, Daniel4, Author              
Hassel, Achim Walter2, Author              
Affiliations:
1Corrosion, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2074315              
2Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria, ou_persistent22              
3Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
4Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863348              

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Free keywords: Analysis; Deuterium; Electrochemical calibration; Hydrogen; Melt extraction
 Abstract: Determination of hydrogen in solids such as high strength steels or other metals in the ppb or ppm range requires hot-extraction or melt-extraction. Calibration of commercially available hydrogen analysers is performed either by certified reference materials CRMs, often having limited availability and reliability or by gas dosing for which the determined value significantly depends on atmospheric pressure and the construction of the gas dosing valve. The sharp and sudden appearance of very high gas concentrations from gas dosing is very different from real effusion transients and is therefore another source of errors. To overcome these limitations, an electrochemical calibration method for hydrogen analysers was developed and employed in this work. Exactly quantifiable, faradaic amounts of hydrogen can be produced in an electrochemical reaction and detected by the hydrogen analyser. The amount of hydrogen is exactly known from the transferred charge in the reaction following Faradays law; and the current time program determines the apparent hydrogen effusion transient. Random effusion transient shaping becomes possible to fully comply with real samples. Evolution time and current were varied for determining a quantitative relationship. The device was used to produce either diprotium (H-2) or dideuterium (D-2) from the corresponding electrolytes. The functional principle is electrochemical in nature and thus an automation is straightforward, can be easily implemented at an affordable price of 1-5% of the hydrogen analysers price. (C) 2014 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2014-07-01
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Talanta
  Abbreviation : Talanta
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam, The Netherlands : Elsevier
Pages: - Volume / Issue: 125 Sequence Number: - Start / End Page: 257 - 264 Identifier: ISSN: 0039-9140
CoNE: /journals/resource/954925448759