IP 272: Determination of mercaptan sulfur and hydrogen sulfide content of liquefied petroleum gases (LPG) - Electrometric titration method

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  • Method adopted/last revised: 2016
  • Method reapproved: None
  • REF/ISBN: IP272-2937655
  • Status: New
  • First printed in STM books: March 2016


This method describes a procedure for the determination of mercaptan sulfur in liquefied petroleum gases. Hydrogen sulfide if present may also be determined. With a 12 I gas sample the method gives a minimum detection level of 14 mg/m3 (as sulfur) for mercaptans and 7 mg/m3 (as sulfur) for hydrogen sulfide. The method is applicable in the presence of acetylenes but cyanides may interfere.

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