Detectability enhancement of spectrophotometric detectors by the use of multidimensional gas chromatography

✍ Scribed by Juan Carlos Medina; James Griffith; K. Ray Houston; Bill Winniford

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 264 KB
• Volume: 25
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.200290002

✦ Synopsis

Abstract

Multidimensional gas chromatography (2D GC) is demonstrated as a way to improve limits of detectability of spectrophotometric detectors. UV and IR detectors are generally less sensitive than mass spectrometers or other GC detectors. This has placed some limitations on the useful capabilities provided by spectrophotometric detectors, such as the ability to provide structure‐related information for a particular analyte. In this paper, we report results from interfacing a 2D GC instrument to a UV detector. Symmetry factor and the ratio of retention time divided by peak width did not show deterioration of the quality of chromatography when a megabore column was used with this detector. Furthermore, an increase in the limits of detectability over that attainable in a single‐column system was realized by using the 2D GC system. However, the low flow (1 mL/min) imposed by the use of a microbore column (250 μm ID) caused significant tailing when the UV detector was used.