2-Hydroxy-4-Methoxybenzophenone Oxime as an Analytical Reagent for Copper(II). Issue 2 (2005)

• Record Type: Journal Article
• Authors: Krishna Purohit, Miss; Desai, K. K.
• Is Part Of: E-Journal of Chemistry. Volume 2:Issue 2(2005)
• Page Start: 161
• Page End: 164
• Publication Date: 2005
• Subjects: Oxime -- Analytical reagent -- 2-Hydroxy-4-methoxybenzophenoneoxime -- HMBO
• DOI: 10.1155/2005/825847
• Languages: English
• ISSNs: 0973-4945

Abstract

Abstract : 2-Hydroxy-4-methoxybenzophenoneoxime (HMBO) was developed as a new analytical reagent for the gravimetric determination of Cu(II). In pH 2.5-9.0 the reagent gives brown coloured precipitate with Cu(II). Spectrophotometric methods revealed that the stoichiometry of the complex is 1:2 (metal: ligand). Beer's law is obeyed up to 31.75 ppm of Cu(II). Molar absorptivity and Sandell's sensitivity at 400 nm were found to be 7.0×10 2 L mol -1 cm -1 and 0.090 μg/cm 2 respectively. The stability constant of Cu(II)-HMBO complex is found to be 6.13×10 9 . Gibb's free energy change for complex formation reaction was found to be -13.93 Kcal/mol. The reagent can be used for the analysis of brass.