Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/5528
Title: Optimization of phenolic compounds analysis by capillary electrophoresis
Author: Lima, Diana L D
Duarte, Armando C
Esteves, Valdemar I
Keywords: Capillary zone electrophoresis
Humic acids
Phenols
CuO oxidation
Issue Date: 2007
Publisher: Elsevier
Abstract: Operational parameters like migration time, temperature, voltage, composition of background electrolyte and content of organic modifier were optimized in CZE for the determination of lignin-like phenolic compounds. The applied background electrolyte buffer consisted of a Na2B4O7, KH2PO4 aqueous solution, pH 9.15 using acetonitrile as organic modifier with UV-detection. Compounds, such as acetosyringone, acetovanillone, syringealdehyde, p-hydroxyacetophenone, vanillin, syringic acid, ferulic acid, p-hydroxybenzaldehyde, p-coumaric acid, vanillic acid and p-hydroxybenzoic acid were applied as reference compounds. The quality and quantity of different phenolic compounds obtained upon alkaline CuO oxidation of a commercial humic acid were determined with CZE using ethylvanillin as internal standard. The optimized CZE revealed has being an appropriate method since it is quick, sensitive and quantitative and does not require a time-consuming sample preparation.
Peer review: yes
URI: http://hdl.handle.net/10773/5528
DOI: 10.1016/j.talanta.2007.01.049
ISSN: 0039-9140
Appears in Collections:DQ - Artigos

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