Abstract:The ligand di-2-pyridyl ketone benzoylhydrazone (DPKBH) is widely used for the determination of transition metal ions in environmental samples. Due to its low solubility in water it is used in aqueous-ethanol (1:1) solvent and for higher sensitivity the pH must be properly adjusted. The properties of DPKBH solutions must be known at different ethanol-water percentages in order to achieve higher sensitivity and/or selectivity for metal analysis. The acid-base behavior of this reagent in aqueous-ethanol solvent … Show more
“…S2a, ESI). The pyridyl group exhibited the highest acidity with a pK a1 = 2.92 (Table 2), which is comparable to other pyridyl derivatives with pK a values that vary between 2 and 4 [63,64].…”
“…S2a, ESI). The pyridyl group exhibited the highest acidity with a pK a1 = 2.92 (Table 2), which is comparable to other pyridyl derivatives with pK a values that vary between 2 and 4 [63,64].…”
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