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Open split interfaces in capillary gas chromatography-mass spectrometry. Yield and quantitative aspects
Citation
Davies, NW, Open split interfaces in capillary gas chromatography-mass spectrometry. Yield and quantitative aspects, Journal of Chromatography A, 450, (3) pp. 388-393. ISSN 0021-9673 (1988) [Letter or Note in Journal]
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DOI: doi:10.1016/S0021-9673(01)83594-9
Abstract
One of the most common methods of coupling capillary gas chromatography
(GC) columns to mass spectrometers is the open split interface first described by
Henneberg et al. These devices usually employ a capillary restrictor tube which
governs the amount of gas allowed into the mass spectrometer, with provision for
venting any excess gas to atmosphere or a second detector. There is also usually
provision for one or two "make-up" or "purge" gas lines to supplement column flow
where necessary, to sweep dead volumes within the interface and to enable "cutting" of
large GC peaks away from the mass spectrometer to avoid contamination. Under
these conditions the column exit is at atmospheric pressure and hence combined
GC-mass spectrometry (MS) results can be directly compared with those from normal
GC, since no change in retention times or resolution will have occurred for the same
flow-rates. These interfaces also facilitate the rapid exchange of columns as the mass
spectrometer is not directly exposed to atmospheric pressure, and enable columns
requiring relatively high flow-rates to be used in conjunction with mass spectrometers
of limited pumping capacity.
Item Details
Item Type: | Letter or Note in Journal |
---|---|
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Separation science |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Davies, NW (Associate Professor Noel Davies) |
ID Code: | 102209 |
Year Published: | 1988 |
Web of Science® Times Cited: | 2 |
Deposited By: | Central Science Laboratory |
Deposited On: | 2015-08-04 |
Last Modified: | 2015-08-04 |
Downloads: | 0 |
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