Optimized and validated spectrophotometric method for the determination of palladium(II) in synthetic mixture and automobile workshop area samples

An optimized and validated spectrophotometric method has been developed for the determination of Pd(II) in synthetic mixture and automobile workshop area samples. The method was based on the complex formation of Pd(II) with cefixime in methanol-distilled water medium in the presence of Na2HPO4-citric acid buffer solution of pH 2.6 at room temperature. The complex showed the maximum absorption wavelength at 352 nm. Beer’s law was obeyed in the working concentration range of 0.7502–16.5004 μg mL−1 with apparent molar absorptivity of 1.224 × 104 L mol−1 cm−1 and Sandell’s sensitivity of 0.002 μg/cm2/0.001 absorbance unit. Limits of detection (LOD) and quantitation (LOQ) for the proposed method were 0.07 and 0.21 μg mL−1, respectively. The effect of diverse ions such as Cu(II), Mg(II), Mn(II), Ca(II), Fe(II), Cr(III), Ni(II), Al(III), Fe(III), Cd(II) and Zn(II) has been studied in the presence of Pd(II) and the maximum tolerance limit of each metal was calculated. The proposed method was successfully applied for the determination of Pd(II) in synthetic mixture and automobile workshop area samples.