Abstract: FT－IR SPECTROSCOPIC STUDIES OF FULVIC ACID FROM WEATHERED COAL AND ITS COMPLEXESSHENG FENGLING；YANG YUHUI；LIU SHIFANG；TAO ZUYI（Department of Modern Physics,Centre of Analysis and Testing，Lanzhou，University，Lanzhou 730000）LU CHANGQING（Institute of Soil Science,Chinese Academy of Sicences,Naijing 210008）ABSTRACT FT-IR spectrum of hlvic acid from wheathered coal of Gong-Xian is determined usingsecond derivative spectroscopy and the spectroscopic resolution is enhanced．Moreover，FT-IRspectra of the complexes of fulvic acid with Ca~(2+)、Ba~(2+)、Cu~(2+)、Pb~(2+) and under different pHare determined and the nature of the coordination of these complexes is discussed. Key words Fulvic acid from weathered coal FT-IR Metal complex.