Carbon/Sulfur, Oxygen/Nitrogen & Hydrogen Analyzer TECHNICAL NOTE 25 Hydrogen Analysis in steel and metals: Solid Extraction or Fusion Jérôme Barraqué Jobin Yvon S.A.S., 16-18 rue du Canal, 91 165 Longjumeau, France Keywords: hydrogen analysis, steel, metals, fusion, extraction, diffusion 1 Introduction The JY HORIBA EMGA 621W Hydrogen analyzer has been designed for accurate measurements of hydrogen content in different sample types such as ferrous metals, non-ferrous metals, semicon- ductors or electronic materials. The hydrogen content is extracted by fusion of the sample in inert gas and analyzed by a high sensitivity ther- mal conductivity detector. It is also possible to avoid fusion and extract hydrogen content in the sample by heating below the melting point. The purpose of this

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