Is cafestol retained on the paper filter in the preparation of filter coffee?. (October 2017)

• Record Type: Journal Article
• Authors: Rendón, Mery Yovana; dos Santos Scholz, Maria Brígida; Bragagnolo, Neura
• Is Part Of: Food research international. Volume 100 Part 1(2017)
• Page Start: 798
• Page End: 803
• Publication Date: 2017-10
• Subjects: Diterpenes -- Cafestol -- Spent coffee -- Roasting degree -- Particle size -- Cultivars; Food -- Analysis -- Periodicals; Food industry and trade -- Periodicals; Food industry and trade -- Canada -- Periodicals; Food Technology -- Periodicals; Food -- Periodicals; Food-Processing Industry -- Periodicals; Aliments -- Industrie et commerce -- Périodiques; Aliments -- Industrie et commerce -- Canada -- Périodiques; Aliments -- Recherche -- Périodiques; Food industry and trade; Canada; Periodicals; Electronic journals; 664.005
• DOI: 10.1016/j.foodres.2017.08.013
• Languages: English
• ISSNs: 0963-9969

Abstract

Abstract: Coffee brew presents sensory, stimulatory and antioxidant properties highly appreciated by consumers, despite being associated with an increase in the level of blood cholesterol due to the effects of the diterpenes, especially cafestol, present in the lipid fraction. Although it is believed that the paper filter retains the brew diterpenes, new studies have shown that sometimes coffee filtered through paper can also increase the blood cholesterol level, putting in doubt the efficiency of the paper filter in retaining the diterpenes. Thus the objective of the present study was to verify the distribution of cafestol between the paper filter, the spent coffee and the coffee brew itself, from two coffee samples containing high and low cafestol contents selected from 13 samples of different cultivars and from different locations. In addition, the effect of the roasting degree on the cafestol contents of the roasted coffee was evaluated and the relationship between particle size of the roasted coffee and the extraction of solids. The highest cafestol content was found in the lightly roasted coffee, and the coffee brew presented higher solids contents when the particle size of the coffee powder was below 500 μm. The results showed that of the initial cafestol concentration present in the roasted coffee, the paper filter retained 12.41%, the spent coffee 87.45% and the brew 0.15%. Thus, one can conclude that the greater part of the coffee cafestol is retained by the spent coffee, due to the low extraction of the lipid fraction by the hot water. Graphical abstract: Highlights: Coffee cultivars show high variability in cafestol levels. The greater part of the coffee cafestol is retained by the spent coffee. The lipid fraction is poorly extracted by the hot water. The paper filters retain the finest particles of the ground roasted coffee. The roasting degree affect the diterpene concentrations.