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Simultaneous preconcentration of Cu, Cd and Pb in the form of mixed xanthate-1,10 - phenanthroline complexes onto microcrystalline naphthalene has been described. The pH range required for quantitative sorption is 5.0-9.0 for each element. Solid mixture containing ternary complexes of metal ions and naphthalene was dissolved in 5 mL of DMF. Cu, Cd and Pb contents were measured using FAAS. The obtained...
A simple new spectrophotometric method for the simultaneous determination of Cu, Fe and Zn in honey using PLS-2 multivariate calibration method has been proposed. Pr was used as an internal standard in order to evaluate the adjustment of the samples on PLS model, and the recovery of the analytes. The result obtained for honey samples was validated applying ICP-AES method. 5-Br-PADAP [2-(5-Br-2-pyridylazo)]-5-diethylaminophenol...
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