Abstract
This review describes the application of flow systems for analyzing various components in seawater. Determination of trace components is essential for understanding the mass circulation and evaluating the degree of pollution in seawater. However, trace analysis is not an easy task because seawater has high ion strength. The flow system can resolve complex problems because of its easy operation, for example, automatic preconcentration of analyte and the separation of matrices. Various applications of flow analytical systems for the analysis of seawater are classified with their analytes.