The antioxidant and chlorogenic acid profiles of whole coffee fruits are influenced by the extraction procedures

Mullen, W. , Nemzer, B., Ou, B., Stalmach, A. , Hunter, J., Clifford, M.N. and Combet, E. (2011) The antioxidant and chlorogenic acid profiles of whole coffee fruits are influenced by the extraction procedures. Journal of Agricultural and Food Chemistry, 59(8), pp. 3754-3762. (doi:10.1021/jf200122m)

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Abstract

Commercial whole coffee fruit extracts and powder samples were analyzed for chlorogenic acids (CGA), caffeine and antioxidant activities. CGA and caffeine were characterized by LCGêÆMSn and HPLC accordingly, and quantified by UV absorbance. ORAC, HORAC, NORAC, SORAC and SOAC (antioxidant capacities) were assessed. Three caffeoylquinic acids, three feruloylquinic acids, three dicaffeoylquinic acids, one p-coumaroylquinic acid, two caffeoylferuloylquinic acids and three putative chlorogenic lactones were quantified, along with a methyl ester of 5-caffeoylquinic acid (detected in one sample, the first such report in any coffee material). Multistep whole coffee fruit extracts displayed higher CGA content than single-step extracts, freeze-dried, or air-dried whole raw fruits. Caffeine in multistep extracts was lower than in the single-step extracts and powders. Antioxidant activity in whole coffee fruit extracts was up to 25-fold higher than in powders dependent upon the radical. Total antioxidant activity of samples displayed strong correlation to CGA content

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Mullen, Dr William and Combet Aspray, Dr Emilie and Stalmach, Dr Angelique
Authors: Mullen, W., Nemzer, B., Ou, B., Stalmach, A., Hunter, J., Clifford, M.N., and Combet, E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Cardiovascular and Medical Sciences
College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
Journal Name:Journal of Agricultural and Food Chemistry
ISSN:0021-8561
Published Online:14 March 2011

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