A Fluorescence Quenching Method for the Determination of Bromate Ion with 4,5-Dibromophenylfluorone and Cetyltrimethylammonium Bromide
- 1 October 1993
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 26 (10) , 2277-2282
- https://doi.org/10.1080/00032719308017468
Abstract
A highly sensitive and selective fluorescence quenching method was developed to determine the bromate ion (BrO3 −) with 4,5-dibromophenylfluorone (DB-PF) as fluorogenic reagent. BrO3 − reacts with potassium bromide in sulfuric acid solution (0.6M) giving bromine (Br2) which is estimated with fluorescence quenching method using DB-PF as fluorogenic reagent. Bromine reacts with DB-PF to produce a compound, whose maximum excitation wavelength and emission wavelength are 543nm, 560nm respectively. The linear calibration range is 0.05–0.5 μg/25ml. The detection limit is 0.05μg/25ml. The method may be used to determine microamounts of BrO3 − in potassium chlorate with satisfactory results. The method offers the advantages of simplicity, rapidity and sensitivity.Keywords
This publication has 1 reference indexed in Scilit:
- Determination of BrO3−by Flow Injection Analysis with 5-Br-PADAP AND SCN−Analytical Letters, 1990