βN-alkanoyl-5-hydroxytryptamines (Cn-5HTs) are the main constituents of coffee wax and may be responsible for the increased severity of gastric disorders in sensitive consumers. Their removal from green coffee beans can result in a “stomach-friendly” brew. This work presents a green approach to Cn-5HTs extraction using the bio-based solvent 2-methyloxolane (2-MeOx). HPLC/DAD analyses on Arabica Brazil samples show that mild conditions (30 min at 50 °C) extract about 90% of the wax, without affecting the caffeine content of the beans, whereas almost complete removal is achieved in 60 min at reflux. 2-MeOx forms an azeotrope with water, its possible re-use has been demonstrated using aqueous 2-MeOx (95.5%) as the solvent. These preliminary results make 2-MeOx a possible candidate for the replacement of dichloromethane (DCM) in coffee dewaxing. The importance of fermentation in reducing Cn-5HTs by about 36% has been demonstrated in an analysis of green beans subjected to different post-harvest treatments.

2-Methyloxolane as an effective bio-based solvent for the removal of βN-alkanoyl-5-hydroxytryptamines from Arabica green coffee beans

Beccari, Fabio
First
;
Binello, Arianna
;
Tagliapietra, Silvia;Bovolin, Patrizia;Cravotto, Giancarlo
Last
2024-01-01

Abstract

βN-alkanoyl-5-hydroxytryptamines (Cn-5HTs) are the main constituents of coffee wax and may be responsible for the increased severity of gastric disorders in sensitive consumers. Their removal from green coffee beans can result in a “stomach-friendly” brew. This work presents a green approach to Cn-5HTs extraction using the bio-based solvent 2-methyloxolane (2-MeOx). HPLC/DAD analyses on Arabica Brazil samples show that mild conditions (30 min at 50 °C) extract about 90% of the wax, without affecting the caffeine content of the beans, whereas almost complete removal is achieved in 60 min at reflux. 2-MeOx forms an azeotrope with water, its possible re-use has been demonstrated using aqueous 2-MeOx (95.5%) as the solvent. These preliminary results make 2-MeOx a possible candidate for the replacement of dichloromethane (DCM) in coffee dewaxing. The importance of fermentation in reducing Cn-5HTs by about 36% has been demonstrated in an analysis of green beans subjected to different post-harvest treatments.
2024
457
1
8
https://www.sciencedirect.com/science/article/pii/S0308814624017850
2-methyloxolane, Arabica green coffee beans, βN-alkanoyl-5-hydroxytryptamines, Coffee wax, Post-harvest treatments, Gastric irritation
Beccari, Fabio; Binello, Arianna; Tagliapietra, Silvia; Bovolin, Patrizia; Cravotto, Giancarlo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1986251
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