Abstract: In this paper,research was made to determine the conditions under which Geraniumwas enriched in sac-charomyces.The resultshowsedthatthe Saccharomyces cerevisiae could do wellinthe enrichmentofGeranium.Inthe malt mediumof 10°Brix into which a quantity of 10×10 -6 Geraniumwas added,the yeast was thu s cultured for about 20h,whentheyeastcells almostscop pedgrowingwhichcouldbeseenfromb iomass.Itturnedouttobethattheen riched quantity of Geraiumwas 98.2μg /g,and the organically changed rate 94%.we also found that in Phosphoric acid -ethylalcoholsolutionGe 4+ andmorinwouldproduceastablecomp lexofstrongfluoranthene,forwhic hhedetectivelimit of Geraniumwas 0.001μg /g,andthe relative standard devia tion4.26%.

Key words: Geranium , Saccharomyces Cerevisiea , Biological enrichment , Spectrofluorometry