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Raman spectroscopic determination of the acidity constants of salicylaldoxime in aqueous solution
Authors:M. A. Elbagerma  H. G. M. Edwards  Gholamhassan Azimi  I. J. Scowen
Abstract:A sensitive and efficient method for the determination of acidity constants of salicylaldoxime (SALO) (2‐hydroxybenzaldehyde oxime), using both Raman spectroscopic and potentiometric methods, at 30 °C in 50% (wt/wt) of ethanol–water mixture and at the constant ionic strength I = 0.1 M is proposed. The effect of pH on the Raman spectra has also been studied. The Raman spectroscopic technique allows the identification of compounds in different molecular and molecular ionic structures. The limit of detection (LOD) was determined to be 0.05 mol dm−3 for SALO by means of Raman peak area. Copyright © 2010 John Wiley & Sons, Ltd.
Keywords:salicylaldoxime  Raman spectroscopy  in situ monitoring  acidity constants  multiwavelength spectroscopy  nonlinear least squares  potentiometry
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