Flow-injection spectrophotometric determination of fluoride based on alizarin fluorine blue in the presence of sodium dodecyl sulphate

The stopped-flow reagent-injection method proposed for the spectrophotometric determination of fluoride with lanthanum (III)/alizarin fluorine blue in the presence of sodium dodecyl sulphate at pH 4.6 (λ max=574 nm) provides a linear calibration graph for 0.08–1.2 mg l −1 fluoride. The relative stan...

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Bibliographic Details
Published in:Analytica chimica acta 1989, Vol.219 (2), p.329-333
Main Authors: Leon-Gonzalez, M.E., Santos-Delgado, M.J., Polo-Diez, L.M.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
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Summary:The stopped-flow reagent-injection method proposed for the spectrophotometric determination of fluoride with lanthanum (III)/alizarin fluorine blue in the presence of sodium dodecyl sulphate at pH 4.6 (λ max=574 nm) provides a linear calibration graph for 0.08–1.2 mg l −1 fluoride. The relative standard deviation ( n=10) was 0.2% at 0.60 mg l −1 fluoride. The sampling rate was 60 h −1. The method is applied to sea and bottled mineral waters with satisfactory results.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)80365-7