Condensing System for Determination of Trace Impurities in Gases by Gas Chromatography

Abstract

A simple accessory suitable for analysis of trace impurities at the parts per million level consists of a condenser column which can be substituted for the sampling volume tube in the Perkin-Elmer precision gas sampling system. This condenser column can be fitted with selected column materials, depending upon the problem. The new condenser system makes it possible to concentrate trace impurities from large sample volumes. Using large enough sample volumes, the minimum detectability of the system is at or below 0.1 p.p.m.

A Fast Gas Chromatographic Method for Measuring C2-C6 Alkanes and Alkenes in Air

“…Most of them, however, are either extremely sophisticated 2 and give more information than may be desired, or are not responsive to extremely low concentrations, 3 ' 4 requiring a freeze-out procedure for analysis of relatively clean samples. 5 We have devised a technique for separating and quantifying C2 to C6 alkanes and alkenes in concentrations down to 1 ppb.…”

Application ofGAS Chromatographic Methodsfor Air Pollution Studies

“…Gas chromatography has two limitations in its application to pollution studies. The first limitation is that if components of a wide boiling range or different characters are present in the * Presented at the 53rd Annual Meeting of APCA, May [22][23][24][25][26]1960, Netherland-Hilton Hotel, Cincinnati, Ohio.…”

“…About one and a half years ago we also investigated the problem of the condensing techniques and built a simple system which adapts itself to a commercial gas chromatograph ft for the determination of trace impurities in gases. 25 This system is a simple modification of the standard Perkin-Elmer precision gas sampling valve, 26 -27 and its schematic is shown in Fig. 3.…”

Concentration and ultrasensitive chromatographic determination of sulfur hexafluoride for application to meteorological tracing

“…A number of concentration procedures have been described (Bellar et al, 1963;Brenner and Ettre, 1959;Cropper and Kaminsky, 1963;Neligan et al, 1965;Novak et al, 1965; Widmark and Widmark, 1967). Each offers a novel way to condense, concentrate, and determine one or more dilute contaminants in air, but none has been demonstrated at a sufficiently high level of sensitivity or applied to SF6.…”