Document Detail

Optimization of performance of monolithic capillary column in gas chromatographic separations.
MedLine Citation:
PMID:  20870237     Owner:  NLM     Status:  In-Data-Review    
Dependence of monolithic column efficiency on column pressure was analyzed using modified Van Deemter relationship with incorporated inlet and outlet column pressures as independent variables. It was demonstrated that the highest column efficiency is observed at high pressures. Inlet and outlet pressure increase has to be controlled in such a way that the relative pressure approaches 1 and the pressure drop across the column is close to zero. Experimental results obtained for open and monolithic capillary columns confirm up to 50% higher column efficiency as compared to column efficiency under standard conditions found using conventional Van Deemter plot. Pressure increase also results in a decrease in the optimal carrier gas velocity and corresponding increase in the analysis time. This drawback can be compensated via an increase in the column temperature.
A Korolev; V Shyrjaeva; T Popova; A Kurganov
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Publication Detail:
Type:  Journal Article     Date:  2010-09-15
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1218     ISSN:  1873-3778     ISO Abbreviation:  J Chromatogr A     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-05-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  3267-73     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Lenin av. 29, Russia.
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