Flow-through coulometry as a calibrationless method in inorganic trace analysis

The possibility of calibration-less determination of trace concentrations of some electrochemically active elements such as Ag, As, Cd, Hg, Pb, etc. by flow-through coulometry is described. The analyte species are collected quantitative-ly from the flowing sample solution on a porous working electro...

Full description

Saved in:
Bibliographic Details
Published inAccreditation and quality assurance Vol. 6; no. 7; pp. 321 - 324
Main Author BEINROHR, Ernest
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.07.2001
Berlin Springer Nature B.V
Subjects
Analysis methods
Analytical chemistry
Applied sciences
Chemistry
Coulometry
Electrochemical methods
Electrolysis
Exact sciences and technology
Lead
Mercury (metal)
Natural water pollution
Pollution
Water treatment and pollution
Chemical analysis
Multicomponent analysis
Environmental materials
Electrochemical method
Chronopotentiometry
Solid particle
Water pollution
Inorganic element
Colloid particle
Quantitative analysis
Environmental control
Online AccessGet full text

Cover

More Information
Summary:The possibility of calibration-less determination of trace concentrations of some electrochemically active elements such as Ag, As, Cd, Hg, Pb, etc. by flow-through coulometry is described. The analyte species are collected quantitative-ly from the flowing sample solution on a porous working electrode made of vi- treous carbon particles set at either a constant potential or constant current. The deposit is stripped by a constant current in the next step and the correspond- ing electrical charge is measured and evaluated. The analyte concentration is calculated by making use of the com- bined Faraday’s laws of electrolysis. The method exerts detection limits about 1 µg/l or lower and a linear concentration range over 3 orders of magnitude.
ISSN:0949-1775
1432-0517
DOI:10.1007/s007690000269