Standard test method for trace quantities of sulfur in light liquid petroleum hydrocarbons by oxidative microcoulometry

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

OSTI ID:6725074

An electrometric method is described for the determination of sulfur in the range of 3.0 to 100 ppM in light liquid hydrocarbons boiling in the range from 80 to 525/sup 0/F (26 to 274/sup 0/C). The sulfur in a liquid sample is converted to sulfur dioxide by oxidative pyrolysis at 800/sup 0/C. The dioxide then flows into a titration cell where it reacts with triiodide ion in the electrolyte. The triiodide consumed is replaced, and the total current required to replace it is a measure of the sulfur present in the original sample. Amounts of total halide up to 10 times and total nitrogen up to 100 times the sulfur concentration level do not interfere with the method. A total heavy metal (nickel, vanadium, lead, etc.) concentration in excess of 500 ppM does cause interference.

• OSTI ID: 6725074
• 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
HYDROCARBONS
INTERFERING ELEMENTS
NONMETALS
ORGANIC COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SULFUR