DETERMINATION OF ALUMINUM IN WATER BY FLOW-INJECTION WITH FLUOROMETRIC DETECTION BY USING SALICYLALDEHYDE CARBOHYDRAZONE AS REAGENT IN A MICELLAR MEDIUM

A room-temperature flow injection spectrofluorimetric method is presen ted for the determination of Al-III, based on the use of salicylaldehy de carbohydrazone in the presence of Triton:X-100 and potassium hydrog enphthalate-hydrochloric acid buffer. Various physical and chemical va riables that affect the reaction in the flow system were evaluated. Th e proposed method is very selective. The calibration graph is linear o ver 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 i n drinking waters.