Samples of seaweeds of economic value were collected from the provinces of Liaoning, Hebei, Shandong, Jiangsu, Zhejiang, Fujian, Guangdong, Guangxi, Hainan in the coast of China from 1988 to 1990. The composition of these samples was determined by modern precision instruments P-E 240C Elements Analyser, Model 835-50Amino Acid Automatic Analyser, Inductively Coupled Plasma Spectrograph (ICP),Gas Chromatography (GC) and High Press Liquid Chromatogrdphy (HPLC) etc.The results were as follows.(1) Sixty species ...