Issue 1134, 1970

A rapid procedure for preparing gas samples for nitrogen-15 determination

Abstract

A method, which is faster and more convenient than previous techniques, is described for converting ammonium sulphate into nitrogen gas for isotopic analysis on a mass spectrometer. The dry ammonium sulphate sample is contained in a small screw-topped vial, in which it can be stored pending analysis. This vial can be coupled with a neoprene O-ring to a special assembly, evacuated, and the sample oxidised with air-free hypobromite solution from a reservoir in the assembly. By using this procedure the usual inconvenience of de-greasing ground-glass joints on sample tubes is avoided, the difficulty of storing samples prior to analysis is overcome and the de-gassing of solutions prior to the conversion of each sample into nitrogen gas is eliminated. The procedure is particularly suitable when many hundreds of samples are to be analysed.

Article information

Article type
Paper

Analyst, 1970,95, 817-822

A rapid procedure for preparing gas samples for nitrogen-15 determination

P. J. Ross and A. E. Martin, Analyst, 1970, 95, 817 DOI: 10.1039/AN9709500817

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