Rapid field test for trace lead in unleaded gasoline (colorimetric method)

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

OSTI ID:6724634

A field test method is described for the determination of small amounts of lead in unleaded gasoline. The sample of gasoline is treated with iodine and tetraethyl ammonium chloride in chloroform and subjected to ultraviolet light. The lead alkyls are removed from the gasoline by extraction with an aqueous ammonium nitrate solution. After extraction, the aqueous phase is filtered into a solution of 4-(2-pyridylazo)-resorcinol disodium salt (PAR) and ammonium hydroxide. The lead-PAR complex is measured colorimetrically at 490 nm, and the lead is determined from a previously established calibration curve. The method is applicable to the measurement of lead in the range from 0.01 to 0.10 g Pb/U.S. gal (2.64 to 26.4 mg Pb/l).

• OSTI ID: 6724634
• 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
400104 -- Spectral Procedures-- (-1987)
ABSORPTION SPECTROSCOPY
CHEMICAL ANALYSIS
ELEMENTS
FUELS
GASOLINE
LEAD
METALS
PETROLEUM PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
SPECTROSCOPY
UNLEADED GASOLINE