Determination of aluminium in water by flow injection with fluorimetric detection by using salicylaldehyde carbohydrazone as reagent in a micellar medium

Abstract

A room-temperature flow injection spectrofluorimetric method is presented for the determination of Al^III, based on the use of salicylaldehyde carbohydrazone in the presence of Triton X-100 and potassium hydrogenphthalate–hydrochloric acid buffer. Various physical and chemical variables that affect the reaction in the flow system were evaluated. The proposed method is very selective. The calibration graph is linear over the range 3–600 ng ml^–1, with a detection limit of 2.25 ng ml^–1 and a relative standard deviation at the 50 ng ml^–1 level of 3.55%. The method was successfully applied to the determination of Al^III in drinking waters.