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Polysaccharides of coffee: dynamic changes during processing, effects on quality, and implications for by-product
Xiaozi Lin1, Qianfan Li2, Wenze Li3
1School of Agriculture, Yunnan University, 650091 Kunming, China; Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, 318000 Taizhou, China; State Key Laboratory of Subtropical Silviculture, College of Forestry and Biotechnology, Zhejiang A&F University, 311300 Hangzhou, China.
Coffee bean polysaccharides significantly impact flavor and health. Roasting degree and variety alter polysaccharide profiles, influencing the final coffee cup characteristics in complex ways.
Area of Science:
- Food Chemistry
- Analytical Chemistry
- Agricultural Science
Background:
- Coffee's popularity stems from its complex chemical makeup, influencing health and by-product potential.
- Polysaccharides are a key component class within coffee beans, affecting beverage properties.
Purpose of the Study:
- To analyze polysaccharide composition across coffee varieties, roasting degrees, and production stages (beans, brews, spent grounds).
- To characterize the relationship between polysaccharide profiles and coffee's organoleptic properties.
- To understand how roasting impacts polysaccharide composition and coffee quality.
Main Methods:
- Compositional analysis of polysaccharides.
- Analysis of nine coffee varieties across three roasting degrees.
- Multidimensional dataset analysis to correlate polysaccharide profiles with organoleptic properties.
Main Results:
- Significant variations in polysaccharide composition were observed among coffee varieties and were profoundly affected by roasting degree.
- Polysaccharide composition in beans and brews showed a strong, non-linear correlation with final cup characteristics, dependent on roasting.
- A comprehensive profile of polysaccharide composition throughout the coffee production chain was established.
Conclusions:
- Polysaccharide composition is a critical determinant of coffee quality and sensory attributes.
- Roasting degree plays a crucial role in modulating polysaccharide profiles and their impact on coffee characteristics.
- Understanding coffee polysaccharide chemistry provides insights into coffee quality and potential by-product utilization.
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