Regression against Temperature of Gas-Liquid Chromatography Retention Factors. Van't Hoff Analysis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43921039" target="_blank" >RIV/60461373:22340/20:43921039 - isvavai.cz</a>
Alternative codes found
RIV/61388963:_____/20:00525141
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acs.jced.0c00119" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jced.0c00119</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jced.0c00119" target="_blank" >10.1021/acs.jced.0c00119</a>
Alternative languages
Result language
angličtina
Original language name
Regression against Temperature of Gas-Liquid Chromatography Retention Factors. Van't Hoff Analysis
Original language description
The present work deals with the precise experimental determination of the gas-liquid chromatography (GLC) retention factors (k) in a sufficiently large temperature range to allow the calculation of the thermodynamic quantities associated with the sorption process. Once isothermal retention factors of three homologous series members of the type H-(CH2)n-Y (Y = CH3, OH, CN) were measured over a temperature range of about 110 K on a low-polar PDMS (HP-1) capillary column and checked for accuracy and precision by "arc plot"representation, the data were analyzed by applying different forms of the van't Hoff relationship. We compared the linear versus nonlinear van’t Hoff plots representing situations characterized by ΔsolvCp° = 0, ΔsolvCp°≠ 0 = constant, and ΔsolvCp° = f(T), respectively (ΔsolvCp° represents the difference in isobaric heat capacity associated with movement of the analyte between the mobile and the stationary phase). The "logarithmic"and "quadratic"nonlinear van't Hoff equations were shown to be more appropriate than the linear van't Hoff equation for determining enthalpy and entropy of solvation. Special attention was devoted to the fitting performance and extrapolation capability of models with nonzero ΔsolvCp°. By several metrics, the quadratic model exhibits better behavior in extrapolations yielding reasonable accuracy for retention time and/or enthalpy of solvation predictions at temperatures located below the experimental range. © 2020 American Chemical Society.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA19-02889S" target="_blank" >GA19-02889S: Stability of amorphous solid dispersions: Predictions by SAFT equations of state and their experimental verification</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Chemical Engineering Data
ISSN
0021-9568
e-ISSN
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Volume of the periodical
65
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
3109-3120
UT code for WoS article
000541740100020
EID of the result in the Scopus database
2-s2.0-85085888322