The contents of seven elements such as Ca,Mg,Fe,Mn,Cu,Zn,K in eight algaes,such as Sargassumgranuliferum,S.thunbergii(Mert.)Kuntze,Tangle,Sargassumpolycystum,Undaria pinnatifida(Harv),Herba Zosterae Marinae,Catenella opuntia(Good,et Woodw.)Grev(red,white)were analysised by flame atomic absorption spectrometry.Those algaes are rich in Ca,Mg,Fe,K,but Cu,Mn and Zn was relatively small.Particularly,Ca is the most abundant element,and Cu is the lowest.The additional standard recovery was obtained between 95.7% and 101.1%,and RSD was between ...