After comparing different lixiviation methods of green tea ,using time after time and multiplestep lixiviation method to lixiviate tea samples,then determined GAB A、 caffein and other general ingredients in tea soup.Constrasting test results and according to the principle of high GABA、 lower caffeine and other ingredients relatively high,chose F915h 水潦和 F615h 水潦 (Fuxuan 9 and Fuyun 6 .dealt with 15h absence of oxygen and left off caffein ) as acute toxicity evaluation samples , F615h 水潦、 F615hs (Fuyun 6 dea...