Kinetic-fl uorimetric Determination of Selenium in the Environment with Use of Methylene Blue

A kinetic-fluorimetric method for determination of traces of selenium (0.01–0.4 ppm) is described. It is based on the fact that the reducing power of alkali sulfides can be considerably enhanced by the addition of elemental selenium. The experimental variables and interferences have been studied. The selenium quantities are estimated in diverse environmental samples.