He, Yuqin; Zhang, Haide; Wen, Nana; Hu, Rongsuo; Wu, Guiping; Zeng, Ying; Li, Xiong; Miao, Xiaodan published an article in 2018, the title of the article was Effects of maltose and lysine treatment on coffee aroma by flash gas chromatography electronic nose and gas chromatography-mass spectrometry.Recommanded Product: 5,6,7,8-Tetrahydroquinoxaline And the article contains the following content:
BACKGROUND : Arabica coffee is a sub-tropical agricultural product in China. Coffee undergoes a series of thermal reactions to form abundant volatile profiles after roasting, so it loses a lot of reducing sugars and amino acids. Adding carbonyl compounds with amino acids before roasting could ensure the nutrition and flavor of coffee. The technol. is versatile for the development of coffee roasting process. This investigation evaluates the effects of combining maltose and lysine (Lys) to modify coffee aroma and the possibly related mechanisms. Arabica coffee was pretreated with a series of solvent ratios of maltose and Lys with an identical concentration (0.25 mol L-1) before microwave heating. RESULTS : It was found that the combination of maltose and Lys significantly (P ≤ 0.05) influenced quality indexes of coffee (pH and browning degree). Ninety-six aromatic volatiles have been isolated and identified. Twelve volatile profiles revealed the relationship between fragrance difference and compound content in coffee. Moreover, coffee aroma was modified by a large number of volatiles with different chem. classes and character. CONCLUSION : Thus, our results suggest that the combination of reagents changed overall aroma quality through a series of complex thermal reactions, especially the ratio of Lys/maltose over 2:1. © 2017 Society of Chem. Industry. The experimental process involved the reaction of 5,6,7,8-Tetrahydroquinoxaline(cas: 34413-35-9).Recommanded Product: 5,6,7,8-Tetrahydroquinoxaline
The Article related to coffee aroma maltose lysine flash gas chromatog electronic nose, maillard reaction, coffee, electronic nose, lysine, solid-phase microextraction-gas chromatography-mass spectrometry (spme-gc-ms) and other aspects.Recommanded Product: 5,6,7,8-Tetrahydroquinoxaline
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