GOST 31371.1-2008 Natural gas. Determination of composition with defined uncertainty by gas chromatography method. Part 1. Guidelines for tailored analysis
2020GOST 31371.1-2020 Natural gas. Determination of composition by gas chromatography method with evaiuation of uncertainty. Part 1. General guidelines and calculation of composition
2008GOST 31371.1-2008 Natural gas. Determination of composition with defined uncertainty by gas chromatography method. Part 1. Guidelines for tailored analysis