title: Quantitative NMR spectroscopy for gas analysis for production of primary reference gas mixtures.
abstract: Due to its direct correlation to the number of spins within a sample quantitative NMR spectroscopy (qNMR) is a promising method with absolute comparison abilities in complex systems in technical, as well as metrological applications. Most of the samples studied with qNMR are in liquid state in diluted solutions, while gas-phase applications represent a rarely applied case. Commercially available NMR equipment was used for purity assessment of liquid and liquefied hydrocarbons serving as raw materials for production of primary reference gas standards. Additionally, gas-phase studies were performed within an online NMR flow probe, as well as in a high-pressure NMR setup to check feasibility as verification method for the composition of gas mixtures.
authors.affiliation: Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straβe 11, D-12489 Berlin, Germany. Electronic address: klas.meyer@bam.de.
authors.forename: K
authors.initials: K
authors.lastname: Meyer
authors.affiliation: Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Rademann
authors.affiliation: Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straβe 11, D-12489 Berlin, Germany; Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany.
authors.forename: U
authors.initials: U
authors.lastname: Panne
authors.affiliation: Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straβe 11, D-12489 Berlin, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Maiwald
keywords: Gas-phase NMR spectroscopy; Purity assessment; Quantitative NMR spectroscopy; Reference gas mixtures