Spectrofluorimetric determination of BrO 3 − by oxidation of 1,2,4-trihydroxyanthraquinone-3-carboxylic acid

Salinas, F.; Peña, Arsenio Muñoz de la; Murillo, J. A.

doi:10.1007/bf01237262

Cited by 2 publications

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“…Indirect analytical methods without preconcentration steps are mainly based on the reaction of bromate with organic reagents and photometric or fluorimetric detection of the oxidation products [21,22]. With respect to automation, similar non-ion chromatographic procedures were performed by flow injection, resulting in a detection limit of about 1 ~tgL -1 [23], Indirect methods may also include ion chromatographic separation of bromate and post-column derivatization with photometric detection [24,25].…”

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Fluorimetric determination of bromate by ion-exchange separation and post-column derivatization

Gahr

Huber

1998

Mikrochim Acta

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Abstract. For the determination of bromate in drink-ing water a stopped-flow post-column reaction was developed following the separation of bromate from the matrix by an anion-exchange column. In the postcolumn reaction the analyte was used to oxidize the azo dye sulfonaphtholazoresorcinol, SNAR, and the residual amount was converted into a fluorescent binuclear complex by an excess of gallium ions. The fluorescence was monitored at 585nm, with a maximum excitation wavelength at 521 nm. The determination of bromate is based on the decrease of the fluorescence intensity with increasing bromate concentration. The given hydrodynamic parameters and the condition of equal flow rates of the two branch streams at each Tpiece have to be considered as an important criterion for the experimental set-up. The volume flows and the concentrations required for the reagent solutions in the influent of each T-piece were determined as a result of batch experiments and theoretical considerations. The limit of detection was 0.28 gg L-lbromate for the flow method, which shows linearity up to 15 ggL -1 bromate.

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confidence: 99%