Effect of the interface on separation in multicapillary gas chromatography-based hyphenated techniques for speciation analysis of organometallic compounds

This paper reports the effect of transfer line (TL) internal diameter (i.d.) on gas chromatographic separation characteristics such as efficiency and speed, when a multicapillary (MC) column is used for speciation analysis of mercury. Five different TL consisting of fused-silica capillaries with 0.1...

Full description

Saved in:
Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2005-08, Vol.382 (8), p.1993-1998
Main Authors: Jitaru, Petru, Birzu, Adrian, Mocanu, Raluca, Adams, Freddy C
Format: Article
Language:English
Subjects:
Chromatography, Gas - instrumentation
Equipment Design
Organometallic Compounds - analysis
Organometallic Compounds - chemistry
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper reports the effect of transfer line (TL) internal diameter (i.d.) on gas chromatographic separation characteristics such as efficiency and speed, when a multicapillary (MC) column is used for speciation analysis of mercury. Five different TL consisting of fused-silica capillaries with 0.15, 0.20, 0.25, 0.32, and 0.53 mm i.d. are compared. The separation efficiency and total chromatographic run time are critically affected by the i.d. of the TL. Narrow capillaries (i.d.< or =0.20 mm) produce minimum peak dispersion whereas wide capillaries result in narrow peaks and shorter chromatographic analysis times. A thermodynamic approach is proposed to describe the motion of the analytes through the separation column and TL. The model provides good agreement with the experimental data for high pressures (> or =35 psig) and wide TL (> or =0.25 mm i.d.).
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-005-3297-y