DEVELOPMENT OF A REFERENCE MATERIAL FOR HYDROGEN CONTENTS MEASUREMENT

A. Yun-Hee Lee, B. Yongil Kim, C. Jongseo Park, D. Unbong Baek, E. Kwon Sang Ryu

Abstract

By heating a metal sample exposed to hydrogen environment until its melting point, whole hydrogen can be released and its content is quantitatively measured with a thermal conductivity detector (TCD). Reference materials with already-known hydrogen contents are needed to calibrate the detector. In this study, we proposed a new concept for making the reference material; the targeted hydrogen content can be obtained by controlling mixing amount of a hydride with its balancing weight. The hydrogen contents can be roughly calculated by considering the chemical stoichiometry of the hydride. A linear proportional relationship was identified between the calculated hydrogen contents and the empirically measured values from the detector. However, both hydrogen contents did not coincide with each other numerically. This phenomenon was discussed from several factors such as partial hydrogenation and air-bone contaminants in the hydride, inconsistent calibration procedure, impurity involved in the measurement, etc.

Keywords

reference material, gravimetric hydrogen contents, thermal hydrogen release, metal hydride, hydrogen-assisted damage

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IMEKO-WC-2012-TC20-O9.pdf

DOI

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IMEKO TC

TC20 - Measurements of Energy and Related Quantities

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