METHOD OF DETERMINING HYDROGEN SULFIDE AND MERCAPTANS IN HYDROCARBON GASES TO PERFORM PROCESS CONTROL Russian patent published in 2008 - IPC G01N31/22 G01N21/78 B01D53/48 

FIELD: analytical methods.

SUBSTANCE: method of determining hydrogen sulfide and mercaptans in hydrocarbon gases in order to prevent corrosion of pipelines comprises sampling, consecutively introducing sample into reaction vessel with absorption solution of alkali metal carbonate to remove hydrogen sulfide and then into reaction vessel with absorption solution of alkali in ethyl alcohol to remove mercaptans, while simultaneously adding hydrochloric acid solution of p-phenylenediamine (photometric reagent) followed by adding auxiliary hydrochloric acid solution of ferric ions, stirring mixture with air flow to form uniform colored solution in each vessel, separately passing obtained solutions heated to 35-40°C to photometric detector, measuring signals from sample in photometric detector, and comparing measured signals with background signals.

EFFECT: simplified procedure and increased safety and information intensity of analysis.

4 cl, 3 tbl