Dynamic Behaviour of C18HPLC Columns by Stimulus-Response Analysis Part II: Determination of Dispersion Coefficients Via Peclet Numbers
作者:
Mehmet Mutlu,
Vural Gökmen,
Jale Acar,
期刊:
Journal of Liquid Chromatography & Related Technologies
(Taylor Available online 1996)
卷期:
Volume 19,
issue 19
页码: 3193-3199
ISSN:1082-6076
年代: 1996
DOI:10.1080/10826079608015817
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In this study, the dispersion coefficients of acetonitrile, ascorbic acid, patulin, 5-hydroxymethylfurfural, 2,4-dichlorophenoxy- acetic acid, 4-chlorophenoxyacetic acid and β-naphtoxyacetic acid are determined by using the stimulus-response technique. The system was pulse stimulated with 10 μL of each tracer with definite concentrations at the flow rate of 1 mL/min. The resulting chromatograms, so called response “C” curves, were obtained for each tracer, individually. The Peclet numbers of each tracer were calculated and evaluated to get dispersion coefficients. The relative dispersion coefficients, based upon the non interacting tracer Acetonitrile (D: 1.83 × 10−6cm/s), were calculated as follows; acetonitrile: 1.00, ascorbic acid: 3.72, patulin: 1.34, 5-hydroxymethylfurfural: 1.68, 2,4-dichloro-phenoxyacetic acid: 2.32, 4-chlorophenoxyacetic acid: 3.23 and β-naphtoxyacetic acid, 2.70.
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