Premium
On the adsorption voltammetry of the boron‐Beryllon III system: Part I. Determination of boron in plants and soils
Author(s) -
Jin Wenrui,
Jiao Kui,
Metzner H.
Publication year - 1993
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140050511
Subject(s) - boron , chemistry , adsorption , voltammetry , electrochemistry , electrolyte , cyclic voltammetry , analytical chemistry (journal) , inorganic chemistry , supporting electrolyte , electrode , linear sweep voltammetry , chromatography , organic chemistry
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.