The distribution and seasonal variation of dissolved free amino acids (DFAA) in the surface and bottom seawater of Jiaozhou Bay at ten stations from Jan. to Nov. in 1986 were investigated using reverse-phase HPLC method.The monthly average contents of total dissolved free amino adds (TDFAA)in surface seawater at seven station from Jan. to Nov. range from 1.24 to 2. 28 μmol /L. Most stations exhibit the lowest values (0.4 μmol /L ) in Feb., generally lower than 1.0μ mol /L. The highest value (5.0μ mol /L ) a...