Determination of Nickel in Environmental Samples by Flotation Spectra-photometric Method using Dimethyl Glyoxime

Subject Areas : environmental management

Mohammad Hadi Givianrad ¹ ( استادیار گروه شیمی، دانشکده علوم پایه،دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران *(مسئول مکاتبات). )
Amir Hossein Haghighaty ² ( مربی گروه مهندسی نفت ،دانشکده مهندسی نفت وگاز ،دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، ایران. )

Received: 2008-12-30 Accepted : 2009-05-17 Published : 2013-09-23

Keywords: nickel, Dimethyl Glyoxime, Flotation Spectrophotometric, Environmental Samples, Preconcentration&#x0D, &#x0D, -,

Abstract :

This paper describes a simple and highly selective method for the separation, pre-concentration andspectra-photometric determination of low concentration of Nickel. The method is based on theflotation of complex of Ni2+ and dimethyl glyoxime between aqueous and n-cyclohexane interface atpH 7. The amount of nickel was measured by spectra-photometric method at 327 nm, after thedissolution of the complex in chloroform. For study of the performance of this method as a simple andfast method for the determination of nickel, some environmental samples like, industrial wastewater,seawater and river water were analyzed. Moreover, the accuracy of this method was verified throughdetermination of nickel in samples all over again by flame atomic absorption spectrometry technique.The result revealed the high efficiency of proposed method in trace analysis of nickel in complicatedenvironmental samples. Consequently, concerning the simplicity, economical and lack of harmfulorganic solvents, this method could be used in environmental and industrial laboratories as a routinemethod.

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