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Food Chem X. 2019 May 23;2:100033. doi: 10.1016/j.fochx.2019.100033. eCollection 2019 Jun 30.

Comprehensive characterization of hydroxycinnamoyl derivatives in green and roasted coffee beans: A new group of methyl hydroxycinnamoyl quinate.

Author information

1
National Institute of Agricultural Science, Rural Development Administration, 166, Nongsaengmyeong-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do, Republic of Korea.
2
Department of Food Science and Human Nutrition, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, Republic of Korea.

Abstract

The aim of this study was to quantitatively characterize 19 green and roasted coffee beans by ultra-performance liquid chromatography coupled with diode array detector and quadrupole time-of-flight mass spectrometry. A total of 57 phenolic acids including nine methyl ester of mono-, di-caffeoylquinic acid, and feruloylquinic acid were identified. The methyl hydroxycinnamoyl quinates are reported for the first time from Coffea arabica and Coffea robusta. The total phenolic content ranged from 5628 ± 227 to 8581 ± 109 mg/100 g dry weight (DW) in green, and from 791 ± 63 to 1891 ± 37 mg/100 g DW roasted beans. The methyl caffeoylquinates accounted for 2.1% of the total phenolic acids. The result suggested that the phenolic composition was affected by the type of species, cultivars, and roasting process. Hence, to retain the balance between health beneficial phenolics and sensory attributes, optimization of roasting condition specific to the cultivar type substantially required.

KEYWORDS:

1-O-Caffeoylquinic acid (PubChem CID: 10155076); 3,4-Di-O-Caffeoylquinic acid (PubChem CID: 6474309); 3,5-Di-O-Caffeoylquinic acid (PubChem CID: 6474310); 3-O-p-Coumaroylquinic acid (PubChem CID: 9945785); 4,5-Di-O-Caffeoylquinic acid (PubChem CID: 5281780); 4-O-Caffeoylquinic acid (PubChem CID: 9798666); 4-O-p-Coumaroylquinic acid (PubChem CID: 5281766); 5-O-Caffeoylquinic acid (PubChem CID: 1794427); 5-O-Feruloylquinic acid (PubChem CID: 15901362); 5-O-p-Coumaroylquinic acid (PubChem CID: 6441280); Caffeic acid (PubChem CID: 689043); Caffeoyl-N-tryptophan (PubChem CID: 15228042); Ferulic acid (PubChem CID: 445858); Green and roasted coffee beans; Methyl hydroxycinnamoyl quinates; UPLC-DAD-QToF-MS

Conflict of interest statement

The authors declare that they have no competing interests.

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