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Preparation and characterization of p-tert-butylcalix[8]arene bonded capillaries for open-tubular capillary electrochromatography

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Wu, XJ, Liu, HX, Liu, H, Zhang, SS and Haddad, PR 2003 , 'Preparation and characterization of p-tert-butylcalix[8]arene bonded capillaries for open-tubular capillary electrochromatography' , Analytica Chimica Acta, vol. 478, no. 2 , pp. 191-197 , doi: 10.1016/S0003-2670(02)01519-2.

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Abstract

p-tert-Butylcalix[8]arene bonded capillaries for open-tubular capillary electrochromatography were prepared with γ-glycidoxypropyltrimethoxysilane as a bridge. The bonded capillary displayed low and steady electroosmotic flow (EOF) values over the pH range from 4 to 9. Detection limits for direct spectrophotometric detection at 277 nm for benzenediols (at a signal to noise ratio of 2) were 0.96 mg l−1 for the unbonded capillary and 1.48 mg l−1 for the bonded capillary, showing that the bonded layer did not show significant absorbance and hence decreased sensitivity. The bonded capillaries showed good separation selectivity for o-, m- and p-benzenediols, α- and β-naphthols, and α- and β-naphthylamines. This selectivity was attributed to significant interactions between the analytes and the bonded p-tert-butylcalix[8]arene, which contributed to the electrochromatographic separation mechanism. The bonded capillaries gave high stability and reproducibility.

Item Type: Article
Authors/Creators:Wu, XJ and Liu, HX and Liu, H and Zhang, SS and Haddad, PR
Keywords: p-tert-Butylcalix[8]arene; Bonded capillary; Open-tubular capillary electrophoresis
Journal or Publication Title: Analytica Chimica Acta
ISSN: 0003-2670
DOI / ID Number: 10.1016/S0003-2670(02)01519-2
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