ASTM D7833 – Standard Refinery Gas Analysis (RGA)
Analyzer Description
Configuration:
5-valve, packed and capillary columns, TCD / TCD / FID
Sample type:
Natural gas, sour gas, other refinery gases
Components separated:
C1 - C7, hydrogen, carbon dioxide, hydrogen sulfide, oxygen, nitrogen, carbon monoxide
Lower detection limits:
20 ppm for hydrocarbons, 100 ppm for permanent gases, 500 ppm for H2S
Methods met:
ASTM D1945, ASTM D1946, ASTM D7833, UOP 539, Wasson-ECE 383
Typical Chromatogram
Key Features and Benefits
- Liquid valves can be added for LPG analysis
- The backflush peak can be tailored to specific samples (e.g. C6+ or C8+ backflush composite peaks)
- Can be converted to all capillary columns to achieve better resolution and detection limits
- A fourth detector can be added for additional capabilities such as analysis of oxygenates, heavy components, trace carbon oxides, or sulfur
Corporate Headquarters
Wasson-ECE Instrumentation
101 Rome Ct., Fort Collins, Colorado USA 80524
Phone: +1 (970) 221-9179
Fax: +1 (970) 221-9364
© 2026. All Rights Reserved.
When you can't afford to be wrong. TM