X-ray quantitive analysis of tetraethyl lead in gasoline

Abstract

and the cover are washed, 4 drops of 0.1 per cent alcohol solution of dimethylaminobenzene are added, and the solution is titrated with 0.25 N sodium hydroxide to a slight pink color of the indicator. The number of cubic centimeters of 'acid required to dissolve the precipitate of calcium carbonate multiplied by 1.4 gives the per cent of CaO in the sample.

X-Ray Absorption Spectrometry for Determination of Tetraethyllead in Gasoline

“…THE application of x-ray methods to chemical analysis has received attention during the past few years as a result of the development of improved techniques for intensity measurements with Geiger counters, and with the combination of photomultiplier tube and phosphor. Several articles have dealt with the particular problem of the determination of tetraethyllead in gasoline by x-ray absorption (1,3,4). The present paper de-scribes the utilization of the x-ray fluorescence spectrum for the determination of lead and bromine in gasoline.…”

Determination of Tetraethyllead in Gasoline by X-Ray Absorptiometry

“…To accomplish this, the right-hand beam was blocked with lead sheet and the left-hand beam was used as a single-beam instrument. The following measurements were made: (1) with the voltage regulator in the circuit and an input voltage of 100, the thickness of aluminum to give a peak intensity reading of 90 on the amplification level was determined, (2) with the voltage regulator out and the same thickness of aluminum as determined in (1), the input voltage to give a peak intensity reading of 90 was determined. The equivalent root mean square voltages were obtained by steps (1) and (2) at 100, 75, and 50 input volts (Table I).…”

X-Ray Absorption

“…Fuller (11) used photographic means to compare the absorbance of alloys for the purpose oi establishing their composition. Aborn and Brown (1), acting upon a suggestion of George Calingaert, applied absorptiometry of this type to the determination of tetraethyllead in gasoline and used an ionization chamber as detector. Recently, Sullivan and Friedman (28 > employed a Geiger counter for the same purpose.…”