ISSN:
1040-0397
Schlagwort(e):
Boron
;
Adsorption voltammetry
;
Beryllon III
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
A very sensitive electrochemical adsorptive voltammetric procedure for trace measurements of boron(III) in plants and soils is described. The complex of boron(III) with Beryllon III is adsorbed on a dropping mercury electrode (DME) with a long lifetime, and the reduction current of the accumulated complex is measured by linear sweep voltammetry. In order to form the boron(III) complex with Beryllon III, it is necessary to boil the solution for 15 minutes. The electrochemical behavior of the complex is explored. The size of the complex peak, which appears at a position between two peaks of reduction of the ligand, is proportional to the boron concentration. Optimum experimental conditions include 0.05 M HOAc/0.25 M NaOAc as supporting electrolyte, 1 × 10-4 M Beryllon III, solution pH 4.4, and an initial potential of -0.30 V (versus SCE). The linear range of the determination of boron is 4 × 10-5 -1 × 10-5 M. The relative standard error of the method is 0.76% for 3 × 10-6 M boron (III) and 3.4% for 6 × 10-7 M boron (III), respectively.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/elan.1140050511
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