PHOSPHORESCENCE DETECTION IN FLOWING SYSTEMS - SELECTIVE DETERMINATION OF ALUMINUM BY FLOW-INJECTION LIQUID ROOM-TEMPERATURE PHOSPHORIMETRY

The concept of the micelle stabilized liquid room-temperature phosphorescence (MS-LRTP) was applied to the determination of a metal (aluminium) in a flowing system. A three-line flow-injection manifold was developed and various parameters were optimized. A linear calibration graph was obtained for 0-4 μg ml-1 aluminium. The limit of detection was 50 ng ml-1 and the relative standard deviations for 0.1 and 1.0 μg ml-1 aluminium were 2.7 and 1.3% respectively. The proposed procedure is fairly selective. More than 20 common ions studied did not interfere with the determination of aluminium or could be masked by appropriate reagents. The flow-injection method proposed was applied without any preliminary separation to the determination of aluminium in simulated synthetic samples in water and in clinical samples of particular importance in the control of aluminium toxicity in renal failure patients. © 1990.