Standard test method for mercaptan sulfur in gasoline, kerosine, aviation turbine, and distillate fuels (potentiometric method)

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Annu. Book ASTM Stand.; (United States)

OSTI ID:6725069

A potentiometric methiod is described for the determination of mercaptan sulfur in gasoline, kerosines, aviation turbine fuels, and distillate fuels containing from 0.0003 to 0.01 wt percent of mercaptan sulfur. The hydrogen sulfide-free sample is dissolved in an alcoholic sodium acetate titration solution and tritiated potentiometrically with silver nitrate solution using the potential between a glass reference electrode and a silver/silver-sulfide indicating electrode as an indicator. The mercaptan sulfur is precipitated as silver mercaptide, and the end point in the titration is indicated by the large change in cell potential. Organic sulfur compounds do not interfere with the determination, nor does elemental sulfur in amounts less than 0.0005 wt percent. Hydrogen sulfide does interfere and must be removed.

• OSTI ID: 6725069
• Journal Information: Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 25; ISSN ASTSA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
AVIATION FUELS
CHEMICAL ANALYSIS
ELEMENTS
FUEL OILS
FUELS
GASOLINE
HEATING OILS
KEROSENE
NONMETALS
OILS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POTENTIOMETRY
SULFUR
THIOLS
TITRATION