Kinetic flow-injection spectrofluorimetric method for the determination of fluoride

✍ Scribed by V. Marco; F. Carrillo; C. Pérez-Conde; C. Cámara

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 369 KB
• Volume: 283
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85261-h

✦ Synopsis

A flow injection-spectrofluorimetric method is reported for the determination of fluoride, based on the ability of trace fluoride to increase the rate of formation of a fluorescent Al(III)-Eriochrome Red B complex in the presence of hexamethylenetetramine. Various chemical and physical variables affecting the reaction and its kinetics in the flow system were evaluated. The proposed method is very sensitive, with a detection limit of 10 pg I-' and a linear calibration graph in the range 1 x 10m6-2 X 10d4 M. The method was successfully applied to the determination of fluoride in tap and mineral waters.