Effects of Low Temperature Circulation on Tea Freshness

It is important to select appropriate temperature to ensure freshness of tea during low temperature circulation.To study effects of low temperature circulation on tea freshness，tea samples were pretreated and stored at different temperatures for a certain time，then weight loss rate、chlorophyll content、Vc content and sensory quality were measured.Results showed that weight loss rate of tea at 8 ℃ was 4.78%，which was lower than the other three kinds of temperature，and average content of Vc was 10.66 mg/g，which was also higher than the other three kinds of temperature. Therefore，best comprehensive freshness preservation effect of tea was at 8 ℃.