Abstract: Spectrophotometric method was applied to determine the quality of mulberry drink.It was found that the absorption value (A) of ethanol extract of mulberry drink would change with the content of mulberry juice,pH,storage time and other conditions.A 520 was in direct proportion to the content of mulberry juice.Stored at room temperature,A 520 decreased gradually with the prolongation of storage time.To store at low temperature and in dark could effectively keep the absorption peak value of mulberry drink.The main component in ethanol extract of mulberry drink was anthocyanin and the change of absorption value reflected its content in mulberry drink.

Key words: Mulberry drink Mulberry juice Anthocyanin Spectrophotometry