Simultaneous determination of Cu(II) and Pd(II) as 4-phenylpiperazinecarbodithioate complex using H-point standard addition method and derivative spectrophotometry

摘要

A new, simple, inexpensive, and sensitive method for thesimultaneous spectrophotometric determination of Cu(II) and Pd(II) byH-point standard addition method and derivative spectrophotometry isdescribed. 4- Phenylpiperazinecarbodithioate (PPDTC) in an anionicmicellar solution of SLS was used as a reagent at pH 4. Theexperimental parameters, such as pH, type of surfactant, concentrationof reagent, and surfactant used, were optimized to minimize theerrors. The linear ranges of the method were 0.1-10 and 0.1-11 mu gmL^{-1} for Cu(II) and Pd(II), respectively. The results of applyingH-point standard addition and fourth derivative spectrophotometryshowed that Cu(II) and Pd(II) can be determined simultaneously withdetection limits of 0.12 and 0.11 mu g mL^{-1} respectively.Therefore, the method of H-point standard addition and fourthderivative spectrophotometry was used for resolving overlapped spectrafor the determination of Cu(II) and Pd(II). This method wassuccessfully applied to the determination of these metals in syntheticand real samples.