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Etude de quelques nouvelles Réactions fluorescentes de l'acide borique et Dosage fluorimétrique de quantités de bore de l'ordre du Nanogramme
Author(s) -
Marcantonatos M. A.,
Monnier D.
Publication year - 1965
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19650480121
Subject(s) - chemistry , boric acid , reagent , sulfuric acid , boron , fluorescence , benzophenone , nuclear chemistry , inorganic chemistry , polymer chemistry , organic chemistry , physics , quantum mechanics
In concentrated sulfuric acid, boric acid reacted with nine substituted 2‐hydroxybenzophenones, to form fluorescent complexes. Excitation spectra indicate that these complexes are similar in structure, and fluorescence spectra show that the composition and intensity of fluorescent light depend on the electronic nature of the various substituents of the complexing agents. The optimal conditions of complex formation are investigated and the relative sensitivity of the reagents is established. All the reactants studied can be used for the determination of submicrogram quantities of boron. 2‐hydroxy‐4‐methoxy‐4′‐chloro‐benzophenone is the most sensitive reactant; it allows the determination of 0,00036 to 0,036 μg of boron (as boric acid) per ml (total volume: 3 ml) with a precision of ± 21% and ± 1,5%, respectively.