Spectrophotometric determination of nickel(II) in different samples by complexation with some triazolylazo dyes
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A. Khedr
Abstract
A new sensitive spectrophotometric method for the determination of nickel(II) with 3-(2-hydroxy-5-acetyl-(L1),-5-ethoxycarbonyl-(L2),-5-methyl-(L3),-5-formyl-(L4),-5-bromophen-1-ylazo)-1,2,4-triazole (L5), and 3-(2,4-dihydroxyphen-1-ylazo)-1,2,4-triazole (L6) in aqueous media containing 40 vol. % methanol has been developed. The method is based on the formation of stable coloured Ni(II) complexes with stoichiometric ratios 1: 1 and 1: 2 (n(M): n(L)). Linear calibration graphs are obtained up to 7.04 µg cm−3 of nickel(II) under optimum conditions attained from investigation of complex formation. The absorption maxima varied from 485 nm to 545 nm and the molar absorptivities ranged from 0.84 × 104 to 4.65 × 104 dm3 mol−1 cm−1 for 1: 1 and 1: 2 (n(M): n(L)) complexes with varying the substituent on the phenolic ring. The optimum ranges for the direct determination of nickel(II) (Ringbom) and the stability constants of the formed complexes are determined. The developed method was applied to the spectrophotometric determination of nickel(II) in some samples with satisfactory results.
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© 2006 Institute of Chemistry, Slovak Academy of Sciences
Artikel in diesem Heft
- Chemistry for the design and better understanding of cement-based materials and composites
- Surface modifications of natural clinoptilolite-dominated zeolite for phenolic pollutant mitigation
- Flame retardant property of nanopowder aerosols toward methane
- Trace analysis of lead by anodic stripping voltammetry with collection at interdigitated microelectrodes in small-volume samples
- Investigation of the solid samples evaporation from the auxiliary DC arc discharge in the atomic emission spectroscopy
- Determination of bioavailable iron in noncontaminated Slovak soils by flame atomic absorption spectrometry
- Determination of technetium-99 in soils and radioactive wastes using ICP-MS
- Synthesis and characterization of the rare-earth complexes with salicylic acid
- Spectrophotometric determination of nickel(II) in different samples by complexation with some triazolylazo dyes
- Complexes of biologically important ligands. I. Ternary complexes of nickel(II) comprising 1,10-o-phenanthrolineazosulfonamide derivatives and alkyldithiophosphates
- Effects of Cd(II) and Zn(II) complexes with bioactive ligands on some photosynthesizing organisms
- Efficiency of a fixed-bed and a gas-lift three-column reactor for continuous production of ethanol by pectate-and alginate-immobilized Saccharomyces cerevisiae cells
- Reactions and applications of trans-1,2-epoxy-(Z,E)-cyclododeca-5,9-diene
- Dictionary of Carbohydrates. Edited by P. M. Collins. Second Edition
- In memoriam Associate Professor Ing. Vladimír Daněk, DrSc
Artikel in diesem Heft
- Chemistry for the design and better understanding of cement-based materials and composites
- Surface modifications of natural clinoptilolite-dominated zeolite for phenolic pollutant mitigation
- Flame retardant property of nanopowder aerosols toward methane
- Trace analysis of lead by anodic stripping voltammetry with collection at interdigitated microelectrodes in small-volume samples
- Investigation of the solid samples evaporation from the auxiliary DC arc discharge in the atomic emission spectroscopy
- Determination of bioavailable iron in noncontaminated Slovak soils by flame atomic absorption spectrometry
- Determination of technetium-99 in soils and radioactive wastes using ICP-MS
- Synthesis and characterization of the rare-earth complexes with salicylic acid
- Spectrophotometric determination of nickel(II) in different samples by complexation with some triazolylazo dyes
- Complexes of biologically important ligands. I. Ternary complexes of nickel(II) comprising 1,10-o-phenanthrolineazosulfonamide derivatives and alkyldithiophosphates
- Effects of Cd(II) and Zn(II) complexes with bioactive ligands on some photosynthesizing organisms
- Efficiency of a fixed-bed and a gas-lift three-column reactor for continuous production of ethanol by pectate-and alginate-immobilized Saccharomyces cerevisiae cells
- Reactions and applications of trans-1,2-epoxy-(Z,E)-cyclododeca-5,9-diene
- Dictionary of Carbohydrates. Edited by P. M. Collins. Second Edition
- In memoriam Associate Professor Ing. Vladimír Daněk, DrSc
