Spectrophotometric Complexation Studies of Some Transition and Heavy Metals with a New Pyridine Derivative Ligand and Application of It for Solid Phase Extraction of Ultratrace Copper and Determination by Flame Atomic Absorption Report as inadecuate




Spectrophotometric Complexation Studies of Some Transition and Heavy Metals with a New Pyridine Derivative Ligand and Application of It for Solid Phase Extraction of Ultratrace Copper and Determination by Flame Atomic Absorption - Download this document for free, or read online. Document in PDF available to download.

A new pyridine derivative ligand, E-Pyridine-2-ylmethylidene {2-E-Pyridine-2-ylmethylidene amino ethyl} hasbeen synthesized and kf value of it’s complexes with Cu2+,Ni2+, Cd2+, Zn2+, Co2+, Hg2+ and Ag+ has been determined spectrophometrically. The stability of thecomplexes to vary in acetonitrile solvent was in the order of Cu2+ >Ni2+ > Cd2+ > Zn2+ > Co2+ >Hg2+ > Ag+, thus because this ligand have good selectivityto copper ion, a simple, reliable and rapid method for preconcentration and determinationof the ultratrace amount of copper using octadecyl silica membrane disk modifiedby this ligand, and determination by flame atomic absorption has been presented.Various parameters including pH of aqueous solution, flow rates, the amount of ligand and the type of strippingreagent were optimized. Under optimum experimental conditions, the breakthroughvolume is greater than 2000 ml with an enrichment factor of more than 400 and 0.054 μg×L?1 detection limit. The capacity of the membrane disks modifiedby 6 mg of the ligand has been found to be330.17 gof copper. The effects of various cationic interferences on the percent recoveryof copper ion were studied. The method has been successfully applied for the determinationof copper ion in different water samples.

KEYWORDS

Copper; SPE; C18; Oyridine; FAAS; Spectrophotometry; Formation Constant

Cite this paper

M. Payehghadr, K. Shahbala and H. Shafikhani -Spectrophotometric Complexation Studies of Some Transition and Heavy Metals with a New Pyridine Derivative Ligand and Application of It for Solid Phase Extraction of Ultratrace Copper and Determination by Flame Atomic Absorption Spectrometry,- American Journal of Analytical Chemistry, Vol. 4 No. 1, 2013, pp. 1-7. doi: 10.4236-ajac.2013.41001.





Author: Mahmood Payehghadr, Kobra Shahbala, Homa Shafikhani

Source: http://www.scirp.org/



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