Trace lead analysis method

Details Trace lead analysis method Trace lead analysis method

1975-02-12

1976-05-11

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23230HC, 23230M, G01N 3122, G01N 3322

Patent

active

039559270

ABSTRACT:
The trace lead content of gasoline, specifically in lead concentrations of about 0.01 to 0.10 grams of lead per U.S. gallon of gasoline, is determined colorimetrically by the steps of mixing an iodine solution with the gasoline, subjecting the mixture to ultra-violet light and adding an indicator solution containing 4-(2-pyridylazo)-resorcinol disodium salt with agitation and comparing the resulting color to standard indicator solutions.

REFERENCES:
snyder et al., "A New Field Method for the Determination of Organolead Compounds in Air," Anal. Chem. Vol. 33, No. 9, Aug. 1961, pp. 1175-1180.
Henderson et al., "Rapid Spectrophotometric Determination of Triethyllead, Diethyllead, and Inorganic Lead Ions, and Application to the Determination of Tetraorganolead Compounds," Anal. Chem. Vol. 33, No. 9 Aug. 1961, pp. 1172-1175.
Pilloni et al., "Spectrophotometric Determination of Diethyllead and Diethyltin Ions with 4-(2-Pyridylazo)Resorcinol," Anal. Chim. Acta, 35 (1966) pp. 325-329.
Pilloni, "Complexes of Organolead and Organotin Ions With 1-(2-pyridylazo)-2-Naphthol," Anal. Chim. Acta, 37 (1967) pp. 497-507.
Pollard et al., "4-(2-Pyridylazo)-Resorcinol as a Possible Analytical Reagent for the Colorimetric Estimation of Cobalt, Lead and Uranium," Anal. Chim. Acta, 20 (1959), pp. 26-31.

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