Gas Composition Analysis
Gas Composition Analysis is a gas composition analysis to determine the content or percentage of various types of gas contained in a gas sample.
Scope
Gas composition analysis includes the identification and quantification of hydrocarbons and impurities ranging from methane (C1) to hexane (C6+) and heavy components (C7+). Testing parameters include:
- Light hydrocarbons: Methane (C1), Ethane (C2), Propane (C3), Butane (C4), Pentane (C5), Hexane+ (C6+), C7+
- Non-hydrocarbons: Nitrogen, Oxygen, Carbon Dioxide, Carbon Monoxide
- Contaminants: Hydrogen Sulfide (H₂S), Total Sulfur, Mercaptans, Mercury, Moisture
Test Standards
- ASTM D1945 – Hydrocarbon Types by Gas Chromatography
- GPA 2261 – Analysis for Natural Gas & Similar Gases
- ISO 6974 – Determination of Composition with Defined Uncertainty by GC
- UOP 539 – Hydrocarbon Analysis Methods
- ASTM D5504 / ISO 6326 – Determination of Sulfur and Hydrogen Sulfide
- Karl Fischer Method – Water Content Determination
- ASTM D3588, GPA 2172, ISO 6976 – Energy Calculations (GHV, NHV, Density)
Scope
As a global energy commodity, LNG requires quality control from production through cryogenic transportation to storage. Our LNG laboratory testing includes:
- LNG composition analysis with high-resolution GC
- Determination of water, sulfur, CO₂, N₂, O₂ content
- Impurity & contaminant profiling (Mercury, H₂S, Mercaptans)
- Calculation of energy parameters: GHV, NHV, Density, Molecular Weight
Test Standards
- ISO 6978-2:2003 – Mercury in Natural Gas by GC-AFS/GC-MS
- ISO 6976 – Calculation of Calorific Values, Density, & Wobbe Index
- ISO 17025 – General Requirements for Competence of Testing Laboratories
- ASTM D1945 / GPA 2261 – Compositional Analysis for LNG
- ASTM D3588 – Energy Determination for LNG
Scope
LPG analysis is carried out from refinery output to distribution to ensure safe transportation, storage, and product quality.
Test parameters include:
- Gas composition: C3–C4 hydrocarbons, Oxygen, CO₂, H₂S
- Trace contaminants: Ammonia, Arsine, Carbonyl, Chlorides, Phosphine, Mercaptans, Mercury
- Physics-chemistry: Density, Vapor Pressure, Volatility, Moisture
- Corrosiveness & Inhibitor Effectiveness
Test Standards
- ASTM D1835 – Specification for Liquefied Petroleum (LP) Gases
- ASTM D1265 – Sampling of Liquefied Petroleum Gases
- ISO 8973 – Density & Relative Density of LPG
- ASTM D6667 – Total Volatile Sulfur in LPG
- ASTM D2158 – Corrosiveness to Copper by LPG
- ISO 13757 – Determination of LPG Composition
In addition to compositional analysis, the laboratory also supports energy and physical parameter calculations for commercial, operational, and compliance purposes.
Calculated parameters:
- Gross Heating Value (GHV)
- Net Heating Value (NHV)
- Wobbe Index
- Molecular Weight
- Vapor Density and Relative Density
Test Standards
- ASTM D3588 – Calculation of Heating Value, Compressibility Factor, and Density
- ISO 6976 – Calorific Value & Wobbe Index for Natural Gas & LNG
- GPA 2172 – Calculation of Hydrocarbon Dew Point & Energy
Quality and Compliance Framework
PT. Hidea Inti Daya is committed to international regulatory compliance:
ISO 17025
ASTM International Standards
ISO Standards
GPA Midstream Standards
UOP Methods
Technical Excellence
International standard instruments
GC-MS, ICP, AFS, Karl Fischer, sulfur detectors
On-site & mobile testing
Mobile laboratory support according to field needs
Comprehensive reporting
Includes technical data, quality analysis, and compliance certificates.
Experienced experts
] 20 years in petroleum chemistry, LNG, and LP
