ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
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.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19650480121
Permalink