The concept of flow injection analysis (FIA) was introduced in the mid-seventies. It was preceded by the success of segmented flow analysis, mainly in clinical and environmental analysis. This advance, as well as the development of continuous monitors for process control and environmental monitors, ensured the success of the FIA methodology. As an exceptionally effective means of mechanization for various procedures of wet chemical analysis, the FIA methodology, in use with a whole arsenal of detection methods of modern analytical chemistry, proved to be of great interest to many. The fast and.