Standard test method for sulfur in petroleum gas by oxidative microcoulometry

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

OSTI ID:6708134

The microcoulometric method is applicable to the determination of S in the range of 1.5 to 100 ppM in hydrocarbon products that are gases at normal temperature and pressures. The method is applicable to the determination of volatile S in liquid samples; however, another method must be used for total S on such samples. Oxidative pyrolysis converts the S to SO/sub 2/ which then flows to a titration cell where it reacts with triiodide ion. The total current necessary to coulometrically replace the consumed triiodide ion is a measure of the sulfur present in the sample. Halide concentrations of up to 10 times the S level and total N/sub 2/ concentrations of up to 1.0% do not interfere with the method; however, the method is not applicable in the presence of total heavy metal concentrations in excess of 500 ppM.

• OSTI ID: 6708134
• 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
CHEMICAL ANALYSIS
ELEMENTS
NONMETALS
PETROLEUM PRODUCTS
SULFUR
VOLTAMETRY