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Estimation of partition coefficients by MEKC Part 2: Anthocyanins

✍ Scribed by Lukáš Müller; Petr Bednář; Petr Barták; Karel Lemr; Juraj Ševčík

Book ID
102925616
Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
887 KB
Volume
28
Category
Article
ISSN
1615-9306

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✦ Synopsis

Abstract

The octanol‐water partition coefficients of seven anthocyanins (in neutral form, pH = 7.0) were measured by means of MEKC. A new iterative method for the estimation of migration time of electroosmotic flow (EOF) and micelles in MEKC is presented. This calculation is based on Gauss‐Newton linearization of the dependence between migration indices and migration times of a set of suitable standards and the application of an advanced statistical evaluation procedure. The values of partition coefficients obtained with the aid of an iterative process are compared with values obtained on use of EOF and micelle markers.

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## Abstract Micellar electrokinetic chromatography (MEKC) was evaluated as a new technique for the rapid estimation of octanol‐water partition coefficient (log__K__~ow~). Retention measurements for more than 40 reference pesticides with varied structural characteristics and hydrophobicity were carr