Identification of chemical clusters discriminators of the roast degree in Arabica and Robusta coffee beans

被引:32
作者
Bicho, Natalina Cavaco [1 ,2 ]
Leitao, Antonio Eduardo [2 ]
Ramalho, Jose Cochicho [2 ]
Lidon, Fernando Cebola [1 ]
机构
[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Ciencias & Tecnol Biomassa, P-2829516 Monte De Caparica, Portugal
[2] IP, Inst Invest Cient Trop, Ctr Ecofisiol Bioquim & Biotecnol Vegetal, P-2784505 Oeiras, Portugal
关键词
Arabica coffee; Caffeine; Chlorogenic acids; Roasted coffee beans; Robusta coffee; Trigonelline; CHLOROGENIC ACID; TRIGONELLINE; GREEN;
D O I
10.1007/s00217-011-1518-5
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
To identify chemical parameters that might be used as discriminators, pH, soluble solids, caffeine, trigonelline, total caffeoylquinic acids, 3-O-caffeoylquinic acid, 4-O-caffeoylquinic acid, 5-O-caffeoylquinic acid, total dicaffeoylquinic acids, 3,4-O-dicaffeoylquinic acid, 3,5-O-dicaffeoylquinic acid, 4,5-O-dicaffeoylquinic acid, total feruloylquinic acids, 3-O-feruloylquinic acid, and 5-O-feruloylquinic acid were measured in Arabica and Robusta coffees submitted to three roasting levels. It was found that the fraction of soluble solids increased with roasting level, being slightly higher in Robusta roasted coffee. The contents of caffeine did not vary significantly between roasting degrees within the Arabica and Robusta samples, respectively, revealing a considerable stability during browning. The contents of trigonelline in Arabica and Robusta coffee decreased significantly with browning intensification. Overall, the levels of chlorogenic acids remained higher in Robusta roasted coffee beans but decreased sharply with roast increase. With roasting intensification, the ratio of total caffeoylquinic acids, total dicaffeoylquinic acids, and total feruloylquinic acids varied markedly in both species, with the proportion of total caffeoylquinic acids and total feruloylquinic acids increasing significantly, whereas the opposite occurred with dicaffeoylquinic acids. One can conclude, through the application of a multivariate analysis, that these chemicals form four clusters, constituting caffeine, trigonelline, total dicaffeoylquinic acids, and total feruloylquinic acids a relevant group for T-3 roasting level discrimination, in both coffee species. Additionally, detailing discriminators for roasting intensity in Arabica coffee might be caffeine, trigonelline, 3-O-caffeoylquinic acid, and 4-O-caffeoylquinic acid, whereas in Robusta roasted coffee are trigonelline, 3-O-caffeoylquinic acid, 4-O-caffeoylquinic acid, 5-O-caffeoylquinic acid, 3,4-O-dicaffeoylquinic acid, 3,5-O-dicaffeoylquinic acid, 4,5-O-dicaffeoylquinic acid, 3-O-feruloylquinic acid, and 5-O-feruloylquinic acid.
引用
收藏
页码:303 / 311
页数:9
相关论文
共 38 条
[1]   Estimation of Serpa cheese ripening time using multiple linear regression (MLR) considering rheological, physical and chemical data [J].
Alvarenga, Nuno ;
Silva, Paula ;
Garcia, Jose Rodriguez ;
Sousa, Isabel .
JOURNAL OF DAIRY RESEARCH, 2008, 75 (02) :233-239
[2]   HPLC analysis of nicotinic acid, trigonelline, chlorogenic acid and caffeine in roasted coffee. [J].
Alves, Sandriel Trindade ;
Eloy Dias, Rafael Carlos ;
Benassi, Marta de Toledo ;
dos Santos Scholz, Maria Brigida .
QUIMICA NOVA, 2006, 29 (06) :1164-1168
[3]  
[Anonymous], 1992, 10095 ISO
[4]  
[Anonymous], 1993, CAFFEINE COFFEE HLTH
[5]  
[Anonymous], 1980, 1666 NP DIR GER QUAL
[6]  
[Anonymous], 1982, 4072 ISO
[7]  
AOAC, 1996, COFF TEA, V2
[8]  
*AOAC INT, 1996, DEF TERMS EXPL NOT, V1
[9]  
Clifford M.N., 1985, Coffee, P153, DOI [10.1007/978-94-009-4948-55, DOI 10.1007/978-94-009-4948-5_, DOI 10.1007/978-94-009-4948-55]
[10]  
Clifford M. N., 1977, HUIT C SCI INT CAF, P109