Abstract: THE MULTIPLE ELEMENTS ANALYSIS IN OCEAN MANGANESE-IRON NODULE WITH EDXRF Wang Min；V.Ivanenko；Wu Feng；Wu Guoliang；Xiao Duyuan；A. Metelev（Institute of Technical Physics,Heilongjiang Academy of Sciences, Harbin 150086）（Institute of Chemistry,Far-Eastern Branch of Russian Academy of Sciences）ABSTRACT The saturated and Intermediate analysis methods with the EDXRF are Introduced．The coherencecoefficients among the various elements and calibrated curves of elements concentration are determinedin advance. The optimal measurement is made for the oeean manganese- iron nodule.Key words X-ray fluorescence manganese-iron nodule coherence coefficient