Simultaneous Determination of Lead Alkyls and Halide Scavengers in Gasoline by Gas Chromatography with Flame Ionization Detection.

Abstract

b A gas chromatographic methodwith flame ionization detection for the determination of lead alkyls and scavengers in gasolines is described. These compounds are separated in a partition column and hydrogenated using a nickel catalyst, and the resulting methane and/or ethane is separated from gasoline hydrocarbons on an adsorption column. The equipment employed and its application to the continuous analysis of leaded gasolines are discussed. The reliability of results and the lack of interferences are verified with both laboratory-prepared and commercial samples. HE steady increase in the use of mix-

Analysis of gasoline for antiknock agents with a hydrogen atmosphere flame ionization detector

“…Other GC detection methods that have been investigated for alkyllead analysis include several electron capture procedures (11-13), a flame ionization method which requires a complicated separation and derivation step (14), and a dithiozone spectrophotometric technique (15,16).…”

Gas chromatography

“…Papers have appeared on the determination of lead alkyls in gasoline using the electron capture detector (344). the conventional flame ionization detector (558), and atomic absorption spectroscopy as the detector (340). In the latter work, it was noted that the atomic absorption detector was less sensitive for lead alkyls than the ionization detector but had the advantage of a high degree of selectivity.…”

Determination of tetraalkyllead compounds in gasoline by liquid chromatography-atomic absorption spectrometry

“…Parker et al (6) initially sepa- 1 Present address: U.S. Geological Survey, 923 National Center, Reston, VA 22092. rated all five TAL compounds by isothermal gas chromatography (GC), collected them individually in methanolic iodide scrubbers as they eluted from the column, and then measured the total lead content in each fraction by a dithizone spectrophotometric procedure. This lengthy and complex procedure was improved by gas chromatographic techniques which incorporated on-line electron capture (7)(8)(9), catalytic hydrogenation prederivatization flame ionization (10)(11)(12), and hot-wire thermal conductivity (12) detection systems. However, interferences due to coeluting gasoline matrix constituents frequently plaqued the unambiguous detection of all five TAL compounds using such coventional detectors.…”