Principal components and Procrustean analyses of stripping voltammograms

✍ Scribed by Vladimir Simeon; Damir Pavković; Gina Branica-Jurković

• Book ID: 102981617
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 506 KB
• Volume: 263
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85423-4

✦ Synopsis

Pnnclpal components analysis (PCA), apphed to ddferentlal-pulse anodlc stnppmg voltammograms of a senes of solutions contammg various amounts of Pb2+ and Cd'+, revealed three pnnclpal components, accounted for by the presence of the two metal Ions and of an appreciably curved basehne The analysxs of numerically simulated voltammograms showed that serious errors can anse from the use of Incomplete target vectors unless a "tangent fit" procedure IS used By usmg so-modified voltammetrlc profiles of blank, lead and cadmmm solutions as target vectors m the Procrustean analysis [target factor analysis WA)], It was possible to calculate accurately the concentrations of both metals m all solutions exammed Compared with the exlstmg methods of evaluatmg voltammograms, the proposed PCA-TPA approach has the advantages of bemg global and, at the same tune, simple (linear) and strrughtfonvard