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Raman spectroscopic determination of the acidity constants of salicylaldoxime in aqueous solution
Author(s) -
Elbagerma M. A.,
Edwards H. G. M.,
Azimi Gholamhassan,
Scowen I. J.
Publication year - 2011
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2716
Subject(s) - raman spectroscopy , chemistry , aqueous solution , potentiometric titration , ionic strength , analytical chemistry (journal) , ionic bonding , detection limit , oxime , inorganic chemistry , chromatography , organic chemistry , ion , electrode , physics , optics
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.