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ISO 10101-3:2022PublishedNatural gas — Determination of water by the Karl Fischer method — Part 3: Coulometric procedureISO 10715:2022PublishedNatural gas — Gas samplingISO 10723:2012PublishedNatural gas — Performance evaluation for analytical systemsISO/TR 11150:2007PublishedNatural gas - Hydrocarbon dew point and hydrocarbon contentISO 11541:1997PublishedNatural gas — Determination of water content at high pressureISO 11626:2024PublishedNatural gas — Determination of sulfur compounds — Determination of hydrogen sulfide content by UV absorption methodISO/TR 12148:2009PublishedNatural gas — Calibration of chilled mirror type instruments for hydrocarbon dewpoint (liquid formation)ISO 12213-1:2006PublishedNatural gas — Calculation of compression factor — Part 1: Introduction and guidelinesISO 12213-2:2006PublishedNatural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysisISO 12213-3:2006PublishedNatural gas — Calculation of compression factor — Part 3: Calculation using physical propertiesISO/TR 12748:2015PublishedNatural Gas — Wet gas flow measurement in natural gas operationsISO 13443:1996PublishedNatural gas — Standard reference conditionsISO 13686:2013PublishedNatural gas — Quality designationISO 13734:2013PublishedNatural gas — Organic components used as odorants — Requirements and test methodsISO 14111:1997PublishedNatural gas — Guidelines to traceability in analysisISO 14532:2026PublishedNatural gas — VocabularyISO/TR 14749:2016PublishedNatural gas — Online gas chromatograph for upstream areaISO 15112:2018PublishedNatural gas — Energy determinationISO 15403-1:2006PublishedNatural gas — Natural gas for use as a compressed fuel for vehicles — Part 1: Designation of the qualityISO 15970:2008PublishedNatural gas — Measurement of properties — Volumetric properties: density, pressure, temperature and compression factorISO 15971:2008PublishedNatural gas — Measurement of properties — Calorific value and Wobbe indexISO/TS 16922:2022PublishedNatural gas — OdorizationISO 16960:2014PublishedNatural gas — Determination of sulfur compounds — Determination of total sulfur by oxidative microcoulometry methodISO 17507-1:2025PublishedNatural gas — Calculation of methane number of gaseous fuels for reciprocating internal combustion engines — Part 1: MNc methodISO 17507-2:2025PublishedNatural gas — Calculation of methane number of gaseous fuels for reciprocating internal combustion engines — Part 2: PKI method