CE determination of the thermodynamic pK(a) values and limiting ionic mobilities of 14 low molecular mass UV absorbing ampholytes for accurate characterization of the pH gradient in carrier ampholytes-based IEF and its numeric simulation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10419844" target="_blank" >RIV/00216208:11310/20:10419844 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v4Ytn2ieNP" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v4Ytn2ieNP</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/elps.201900381" target="_blank" >10.1002/elps.201900381</a>
Alternative languages
Result language
angličtina
Original language name
CE determination of the thermodynamic pK(a) values and limiting ionic mobilities of 14 low molecular mass UV absorbing ampholytes for accurate characterization of the pH gradient in carrier ampholytes-based IEF and its numeric simulation
Original language description
Fourteen low molecular mass UV absorbing ampholytes containing 1 or 2 weakly acidic and 1 or 2 weakly basic functional groups that best satisfy Rilbe's requirement for being good carrier ampholytes (Delta pK(a) = pKa(monoanion) - pKa(monocation) < 2) were selected from a large group of commercially readily available ampholytes in a computational study using two software packages (ChemSketch and SPARC). Their electrophoretic mobilities were measured in 10 mM ionic strength BGEs covering the 2 < pH < 12 range. Using our Debye-Huckel and Onsager-Fuoss laws-based new software, AnglerFish (freeware, ), the effective mobilities were recalculated to zero ionic strength from which the thermodynamic pK(a) values and limiting ionic mobilities of the ampholytes were directly calculated by Henderson-Hasselbalch equation-type nonlinear regression. The tabulated thermodynamic pK(a) values and limiting ionic mobilities of these ampholytes (pI markers) facilitate both the overall and the narrow-segment characterization of the pH gradients obtained in IEF in order to mitigate the errors of analyte ampholyte pI assignments caused by the usual (but rarely proven) assumption of pH gradient linearity. These thermodynamic pK(a) and limiting mobility values also enable the reality-based numeric simulation of the IEF process using, for example, Simul (freeware, ).
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
10406 - Analytical chemistry
Result continuities
Project
<a href="/en/project/GA18-11776S" target="_blank" >GA18-11776S: Advanced theoretical and software tools for electrophoresis</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
Electrophoresis
ISSN
0173-0835
e-ISSN
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Volume of the periodical
41
Issue of the periodical within the volume
7-8
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
514-522
UT code for WoS article
000497737000001
EID of the result in the Scopus database
2-s2.0-85075531954