Abstract: Microamounts of Fe,Cu,Zn,Mg,Ca and in herba hedyotidis diffusae were determined by FAAS.The sample was digested with a mixture of conc.HNO3,HClO4 and H2O2 in the ratio of 8 to 1 to 2 by volume.Strontium chloride was added to elminate the interferences of coexisting elements in the determination of Ca and Mg.Standard curves of the 6 elements were prepared by using the respective standard solutions,and linear regression equations with correlation coefficients from 0.986 9 to 0.999 6,were obtained.Test for recovery was made by standard addition method,and the values of recovery found were in the range of 98%-101%.