Abstract: The total concentrations of arsenic in ten kinds of dry seafood products ( DSPs) were determined by inductively coupled plasma mass spectrometry ( ICP- MS) , including Squid, Whitebait, Sardine, Shrimp, Oyster, Clam, Laver, Sargassum fusiform, Kelp, Enteromorpha prolifera. A method using capillary electrophoresis ( CE) hyphenated with ICP-MS was established for the detection of arsenobetaine ( AsB) , arsenocholine ( AsC) , arsenite ( As ( III) ) , arsenate ( As ( V) ) , monomethylarsonic acid ( MMA) and dimethylarsinic acid ( DMA) .The results showed that total concentrations of arsenic in these DSPs were found to be higher than the maximum levels of contaminants in foods ( GB2762-2005) except enteromorpha prolifera.For the species, organic arsenic was the main species in these DSPs, while the inorganic arsenic in the extraction solutions were very low and took approximate 0 to 15.2%of total arsenic.With the advantages of simple operation, less time and samples and accurate result, the method can be used to determine other biological samples.