scope:

This International Standard specifies a method for the rapid analysis of dry naturel gas containing less than 1 % (molar) of hydrocarbons having five or more carbon atoms. It is applicable for the determination of: - hydrocarbons having one to four carbon atoms; - nitrogen; - carbon dioxide; - hydrogen sulphide. The method does not distinguish between oxygen and nitrogen and contamination of the samples by air will give an apparently high value for the nitrogen content. The method is generally applicable to test samples containing the elements and compounds given in table 1 in the ranges indicated.