title: A novel method for measuring trace amounts of total sulphur-containing compounds in hydrogen.
abstract: A novel method for the analysis of total sulphur-containing impurities in a hydrogen matrix has been developed. This method has a limit of detection (LoD) significantly lower than that maximum amount fraction for sulphur-containing compounds (4 nmol mol(-1)) specified by the international standard for hydrogen to be used in fuel cell vehicles (ISO 14687-2). To measure the LoD for this method, a novel gas standard containing five different sulphur-containing compounds at low nmol mol(-1) amount fractions has been gravimetrically prepared. Stable primary gas standards that are traceable to the SI were used to successfully validate the amount fractions of the sulphur-containing compounds in this gas standards using gas chromatography with flame ionisation detection (GC-FID) and sulphur chemiluminescence detection (GC-SCD).
authors.affiliation: Analytical Science Division, National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom. Electronic address: michael.downey@npl.co.uk.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Downey
authors.affiliation: Analytical Science Division, National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom.
authors.forename: Arul
authors.initials: A
authors.lastname: Murugan
authors.affiliation: Analytical Science Division, National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom.
authors.forename: Sam
authors.initials: S
authors.lastname: Bartlett
authors.affiliation: Analytical Science Division, National Physical Laboratory, Teddington, Middlesex TW11 0LW, United Kingdom.
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Brown
mesh_terms: D005410:Flame Ionization / Q000379:methods* / Q000592:standards; D005740:Gases / Q000592:standards; D006859:Hydrogen; D008163:Luminescent Measurements; D012015:Reference Standards; D013457:Sulfur Compounds / Q000032:analysis*
chemical_list: D005740:Gases; D013457:Sulfur Compounds; D006859:Hydrogen
keywords: Gas chromatography; Hydrogen; Purity; Quality; Total sulfur; Trace analysis