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Phytochemistry. 2016 Mar;123:33-9. doi: 10.1016/j.phytochem.2016.01.016. Epub 2016 Feb 3.

Chemical partitioning and antioxidant capacity of green coffee (Coffea arabica and Coffea canephora) of different geographical origin.

Author information

1
Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/A, Turin, Italy.
2
Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/A, Turin, Italy; Biosfered S.r.l., Academic Spin-Off of the University of Turin, Via Quarello 15/A, Turin, Italy.
3
Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/A, Turin, Italy; Biosfered S.r.l., Academic Spin-Off of the University of Turin, Via Quarello 15/A, Turin, Italy. Electronic address: massimo.maffei@unito.it.

Abstract

Green coffee beans of Coffea arabica and Coffea canephora accessions from different geographical origin (Brazil, Colombia, Ethiopia, Honduras, Kenya, Mexico, Peru, Uganda and Vietnam) were extracted and the extracts analyzed by HPLC-ESI-MS/MS for the identification and quantification of chlorogenic acids and caffeine content. Principal component and cluster analyses were used to identify chemical patterns separating the different species and accessions based on their geographical origin. C. canephora showed always a higher caffeine content with respect to C. arabica, whereas the C. arabica accessions from Kenya showed a higher chlorogenic acids and a lower caffeine content. The antioxidant capacity of green coffee extracts was assayed by the reducing power and DPPH assays. The antioxidant capacity correlated with the chlorogenic acids content. The results show that the C. arabica from Kenya possesses the highest chlorogenic acids/caffeine ratio and, among the C. arabica accessions, the highest antioxidant capacity. Therefore, the C. arabica from Kenya is the most suitable green coffee source for nutraceutical applications because of its high antioxidant capacity and low caffeine content.

KEYWORDS:

Antioxidant capacity; Caffeine; Chlorogenic acids; Coffea arabica; Coffea canephora; Geographical origin; Green coffee; Rubiaceae

PMID:
26837609
DOI:
10.1016/j.phytochem.2016.01.016
[Indexed for MEDLINE]
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