A quick method for determination of endogenous abscisic acid in plant material by capillary gas chromatography with electron capture detector(ECD) is described.Advantages of this methods are: (1)simplified purification of plant material, (2) small weight of sample to be used (%) and (4) high detecting sensibility (2 X10-11g.). It is especially suitable for research of high acurracy in which the plant material is rather limited and large number of samples are needed. ...