1. ‘LNG Custody Transfer Handbook’, The International Group of Liquefied Natural Gas Importers (GIIGNL), 6 edn., (2021).
  2. ISO 6976:2016, Natural gas – Calculation of calorific values, density, relative density and Wobbe indices from composition, 3rd edn.
  3. EN ISO 6974-4:2001, Natural gas – Determination of composition with defined uncertainty by gas chromatography.
  4. GPA 2261-00, Analysis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatography.
  5. DIN EN 12838:2000, Installations and equipment for liquefied natural gas – Suitability testing of LNG sampling systems.
  6. ‘LNG Custody Transfer Handbook’, GIIGNL, 6 edn., (2021), p.53.
  7. ISO 8943:2007, Refrigerated light hydrocarbon fluids – Sampling of liquefied natural gas – Continuous and intermittent methods.
  8. ISO 14687-2:2012, Hydrogen fuel – Product specification – Part 2: Proton exchange membrane (PEM) fuel cell applications for road vehicles.
  9. ISO 10723-12-2012, Nat gas – Performance evaluation for analytical systems.
  10. ISO/IEC 17025:2017 specifies the general requirements for the competence, impartiality and consistent operation of laboratories.