2005 Volume 59 Issue 4 Pages 236-241
Simple, rapid and accurate methods of analysis have been developed based on a new concept of flow injection for determination of minor and trace constituents such as B, SO42-, Ca, Mg, NH4+, Fe, Mn, V, Co, and P in seawater and sea salts which are able to contribute to promote the research works in seawater science and the efficient and advanced uses of seawater resources. Flow injection is effective for solving a variety of problems in conventional chemical methods of analysis. In this paper, basic principle and characteristic advantages of flow injection system are outlined together with showing three typical examples (determination of Ca, Mg, B and SO42- in the salts) among the works developed in the author's laboratory. Through all the developed methods of analysis no complicated manual operation was needed and glass apparatus such as beaker, flask, and pipets usually required for chemical analysis was omitted because most analytical operations were done automatically in a narrow bore PTFE tubing.Those additional advantages over the conventional batch system include low sample and reagent consumption, high sampling frequency, low contamination, easy automation and high sensitivity. Those systems were satisfactorily applied to the analysis of salt and seawater samples.