Posted Calculations/Analytical Test Methods
Chromatograph Report
GPA (Gas Processors Association): 2261-20 Analysis for Natural Gas & Similar Gaseous Mixtures by Gas Chromatography
GPA: 2166-05 Obtaining Natural Gas Samples for Analysis by Gas Chromatography 2172-09 Calculation of Gross Heating Value, Relative Density, Compressibility and Theoretical Hydrocarbon Liquid Content for Natural Gas Mixtures for Custody Transfer
GPA: 2145-16 Table of Physical Properties for Hydrocarbons and Other Compounds of Interest to the Natural Gas Industry.
API (American Petroleum Institute): Chapter 14 - Manual of Petroleum Measurement Standards, Section 1 - Collecting and Handling of Natural Gas Samples for Custody Transfer – September 2022.
The calculation used to determine the CHDP (cricondentherm) is the Peng Robinson Revised equation of state.
Sulfur (H2S) Report
ASTM D4468-85 Standard Test Method for Total Sulfur in Gaseous Fuels by Hydrogenolysis and Rateometric Colorimetry.
ASTM D5504-94 Standard Test Method for Determination of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatography and Chemiluminescence.