Spectral (u.v.-vis, i.r.MS), electrochemical and metallochromic properties of 2-hydroxy-benzoylhydrazones of acetylpyridines

Sensitive adsorptive stripping voltammetric method for determination of lead in water using multivariate analysis for optimization

“…2-APSH is an aroylhydrazone characterized by the presence of the triatomic group C N-N, forming coordination compounds with transition metal ions, being noteworthy for its remarkable versatility as chelating agent [17]. Pb(II) is complexed by 2-APSH and the suitability of this ligand for the proposal of a new AdCSV method for lead analysis was examined.…”

“…2-APSH reagent was synthesised by reaction between 2-acetylpyridine and 2-hydroxybenzohydrazide from Sigma-Aldrich (Steinhein, Germany)) as previously reported [17]. A 2 × 10 −4 M stock solution of 2-APSH in extrapure absolute ethanol was prepared weekly and stored at 4 • C in darkness.…”

“…2-APSH is an aroylhydrazone studied in previous works. They were regarded to spectral and metallochromic properties of 2-APSH as well as electrochemical properties by direct current polarography (DCP), differential pulse polarography (DPP) and alternating current polarography (ACP), showing interesting properties as complexing agent of metal ions [17]. The influence of variables on the peak current was studied by using exploratory (Plackett-Burman) and sequential (Simplex) experimental designs to detect significant variables and to obtain optimal conditions, respectively.…”