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Extraction of Zinc(II) Using cloud-point method and determination by Flame Atomic Absorption Spectrometry

[ Ali MOGHIMI ] - Department of Chemistry, Varamin Campus Islamic Azad University, Varamin, Iran
[ Mohsen SHABANI ] - Department of Chemistry, Varamin Campus Islamic Azad University, Varamin, Iran
[ Fatemeh Amouzadeh Khalili ] - Department of Chemistry, East Tehran(Ghiamdasht) Campus Islamic Azad University, Tehran, Iran

خلاصه مقاله:

A new, simple and versatile cloud-point extraction (CPE) methodology has been
developed for Type equation here.the separation and preconcentration of Zinc. The
metals in the initial aqueous solution were complexed with N-(2-ethylhexyl)-pyridine-2-
carboxamide (NEHP) and Triton X-114 was added as surfactant. Dilution of the
surfactant-rich phase with acidified methanol was performed after phase separation, and
the Zinc contents were measured by flame atomic absorption spectrometry. The variables
affecting the cloud-point extraction were optimized using a Box–Behnken design. Under
the optimum experimental conditions, enrichment factors of 29 and 25 were achieved for
Zinc. The accuracy of the method was evaluated and confirmed by analysis of the
ICPAES. The limits of detection expressed to solid sample analysis were 0.1 5g g61 (Zn).
The precision for 10 replicate measurements of 75 5gL-1 Zn was 1.2. The method has
been successfully applied to the analysis of water samples.

Zinc; Cloud-point extraction; water samples