Document Detail

Temporally convoluted Gaussian equations for chromatographic peaks.
MedLine Citation:
PMID:  14969284     Owner:  NLM     Status:  MEDLINE    
Both spatial and temporal peaks that are produced by the discrete parcel model can be mathematically approximated by Gaussian functions, but the transformation from a spatial pattern to a temporal image requires a convolution treatment. A first-order convolution is given for temporal peaks under a linear isotherm, whereas a second-order convolution is proposed for those under non-linear isotherms. Numerical tests show that the peak shapes generated by the proposed temporally convoluted Gaussian equations (TCG) match perfectly with those obtained by the discrete parcel model. Although the full TCG equation may be quite complicated, it can be made easier by a recursion calculation technique, and a group of peak curves can be plotted simultaneously on computer worksheet. The results also suggest that the temporal distortion effect should be predominately considered, in addition to those known-to-exist spatial effects, for explaining the peak asymmetry.
Su-Cheng Pai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of chromatography. A     Volume:  1028     ISSN:  0021-9673     ISO Abbreviation:  J Chromatogr A     Publication Date:  2004 Feb 
Date Detail:
Created Date:  2004-02-18     Completed Date:  2004-09-09     Revised Date:  2009-01-15    
Medline Journal Info:
Nlm Unique ID:  9318488     Medline TA:  J Chromatogr A     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  89-103     Citation Subset:  IM    
Division of Marine Chemistry, Institute of Oceanography, National Taiwan University, PO. Box 23-13, Taipei, Taiwan.
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MeSH Terms
Chromatography / methods*
Models, Theoretical*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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