Standad test method for lead in gasoline: iodine monochloride method

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Annu. Book ASTM Stand.; (United States)

OSTI ID:6556536

This method determines total lead in gasolines containing lead alkyls at concentrations between 0.12 and 6.0 g Pb/UK gal, 0.1 and 5.0 g Pb/US gal, and 0.026 and 1.3 g Pb/litre. A known volume of the sample is diluted with heavy distillate and shaken with aqueous iodine monochloride reagent. Any tetraalkyl lead compounds present react with the iodine monochloride and are extracted into the aqueous phase as the dialkyl lead compounds. The aqueous extract is separated from the gasoline and evaporated to low bulk to decompose free iodine monochloride. Any organic matter present is removed by oxidation with nitric acid, which also serves to convert the dialkyl lead compounds into inorganic lead compounds. The residue is dissolved in distilled water and buffered to pH 5 using sodium acetate-acetic acid buffer. The lead content of the buffered solution is determined by titration with EDTA using xylenol orange as indicator.

• OSTI ID: 6556536
• 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
AMINO ACIDS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
DYES
EDTA
ELEMENTS
FUELS
GASOLINE
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INDICATORS
INORGANIC ACIDS
IODINE CHLORIDES
IODINE COMPOUNDS
LEAD
LIQUID FUELS
METALS
MIXTURES
NITRIC ACID
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PETROLEUM PRODUCTS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SOLUTIONS
TITRATION
XYLENOL ORANGE