Abstract:

In this study, the contents of the main ingredients in red Toona sinensis burgeon were measured, and the results showed that the contents of total water, protein and fat are 83.7%, 23.2% (dry weight) and 10.4% (dry weight), respectively. Red Toona sinensis burgeon is rich in the necessary amino acids(threonine, lysine, leucine, and phenylalanine)and unsaturated fat acids(linoleic acid and linolenic acid). By using the response surface methodology, the optimal extraction condition of flavonoids from red Toona sinensis burgeon was determined as follows: taking 82% ethanol as extractant, ratio of extractant to material 19:1, temperature 60 ℃, and extraction time 15 min. Under these conditions, the yield of total flavonoids is 98.27% ± 0.31% and the total flavonoid content is 3.1% (dry weight).

Key words: red Toona sinensis, response surface methodology, flavonoids