Analytical control of organic additives in electrolytic baths by UV spectroscopy in combination with multivariate analysis |
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| Authors: | M Blanco J Coello H Iturriaga S Maspoch and D Serrano |
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| Institution: | (1) Departamento de Química, Unidad de Química Analítica, Facultad de Ciencias, Universidad Autónoma de Barcelona, E-08193 Bellaterra, Spain, ES |
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| Abstract: | A method for the simultaneous determination of organic additives in Zn(II) and Ni(II) electrolytic baths is proposed. Absorbance
and first-derivative spectra were subjected to direct and inverse multiple linear regression (CLS and ILS, respectively) in
order to choose the optimum alternative. The use of a factor design to prepare the samples enables the identification of interactions
between analytes and their correction by ILS. The results provided by first-derivative spectra were slightly better than those
obtained with absorbance spectra (prediction errors were always less than 2% with the former). The ILS procedure was applied
to three industrial baths used to a different extent, with highly satisfactory results.
Received: 15 June 1998 / Revised: 7 September 1998 / Accepted: 15 September 1998 |
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