Produktet e lëngëta të naftës –Përcaktimi i tipeve të hidrokarbureve dhe komponimeve oksigjenore në benzinë - Metoda gas - kromatografike shumëdimensonale (ISO 22854:2008)

Liquid petroleum products - Determination of hydrocarbon types and oxygenates in automotive-motor gasoline - Multidimensional gas chromatography method (ISO 22854:2008)

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ISO 22854:2008 specifies the gas chromatographic (GC) method for the determination of saturated, olefinic and aromatic hydrocarbons in automotive motor gasoline. Additionally, the benzene content, oxygenate compounds and the total oxygenate content can be determined. ISO 22854:2008 is applicable to automotive motor gasoline with a total volume fraction of aromatics of up to 50 %; a total volume fraction of olefins from about 1,5 % up to 30 %; a volume fraction of oxygenates, from 0,8 % up to 15 %; a total mass fraction of oxygen from about 1,5 % to about 3 %; and a volume fraction of benzene of up to 2 %. Although this test method can be used to determine higher-olefin contents of up to 50 % volume fraction, the precision for olefins was tested only in the range from about 1,5 % volume fraction to about 30 % volume fraction. Although specifically developed for the analysis of automotive motor gasoline that contains oxygenates, ISO 22854:2008 can also be applied to other hydrocarbon streams having similar boiling ranges, such as naphthas and reformates.