Derivative Spectrophotometric Determination of Lead(II) using Diacetylmonoxime-4-hydroxybenzoylhydrazone

Abstract

Diacetylmonoxime-4-hydroxybenzoylhydrazone (DM-4-   HBH) used as an analytical reagent for lead(II). This reagent   gives bright yellow coloured water soluble complex in basic   buffer solution. The maximum absorbance is observed at pH   10. The molar absorptivity and sandell's sensitivity of Pb(II)   λ_max at 440 nm was found to be 1.71 × 10⁴ L mol^-1 cm^-1 and   0.01208 μg/cm². Beer's law validity range 0.414-10.360 μg   mL^-1. Pb(II) forms 1:1 complex with DM-4-HBH and stability   constant of the complex was 9.88 × 10⁵. The first order   derivative method has been developed. The derivative amplitude   was measured by peak height method and shows maximum   amplitude at 484 nm in basic buffer medium. The developed   first order derivative spectrophotometric method was used   for the determination of Pb(II) in synthetic alloy samples.