D6021-22 – Standard Test Method Technical Guide

📐 Scope and Applicable Fuel Types

ASTM D6021-22 provides a standardized method for measuring the total concentration of hydrogen sulfide (H₂S) in complex fuel matrices. The method is applicable for concentrations ranging from 0.01 to 100 µg/g (ppmw). It specifically targets heavy distillates, heavy distillate/residual fuel blends, and residual fuel oils as defined in Specification D396 (Grades 4, 5 Light, 5 Heavy, and 6).