Total Sulfur Analysis in LPG & Gas Samples With NEXIS eQP in Compliance with ASTM D6667 and D7551

Gas pump into a car.

LPG is increasingly used as an automotive fuel sometimes referred to as Autogas and must therefore comply with regulations concerning the sulfur content of automotive fuels, the limits of which are decreasing. LPG and other light hydrocarbons are also finding use as feedstocks for a variety of new refining technologies and can be poisoned by trace amounts of sulfur-bearing materials. The need for low sulfur measurements in this part of the industry is of growing importance.

The Total Sulfur analysis of LPG by combustion UV-Fluorescence detection method is governed by ASTM D6667 [1] and ASTM D7551 [2] and applicable to samples containing 1.0 – 100 mg/kg of sulfur. This application note describes a direct sampling and injection technique that complies with ASTM D6667 and D7551 methods, for measuring low level sulfur in LPG using the NEXIS eQP Total Sulfur Analyzer in conjunction with the NEXIS Gas Module (GM) Gas & LPG Sample introduction module.

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