This method determines trace water in LPG using Gas Chromatography (GC) with a Barrier Ionization Discharge (BID) detector. Sample is introduced to a capillary column using a dedicated valving system. Water separates from other sample components chromatographically and passes through the BID detector with a response proportional to concentration. Trace ppm concentrations are calculated by comparison to a calibration curve.
Sulfur compounds or other compounds that react with iodine potentially interfering with the Karl Fischer titration methods do not interfere.
water; lpg; GC-BID; BID; Karl Fischer Titration; Barrier Ionization Discharge; corrosion-promoting substances; liquified petroleum gas; moisture; mercaptans; H2S; sulfide; ASTM D7995
There is a need for a simplified method for the determination of trace water in LPG. This method can be used to complement, or replace Karl-Fischer methods such as D7995, particularly in samples with interferences that make determination by D7995 difficult.
The title and scope are in draft form and are under development within this