期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 66, 期 2, 页码 295-301出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2006.02.055
关键词
alpha-benzyl dioxime (BDO); spectrophotometric method; surfactant media; sodium dodecyl sulfate (SDS); nickel(II) ion
类别
Highly sensitive and interference-free sensitized spectrophotometric method for the determination of Ni(II) ions is described. The method is based on the reaction between Ni(II) ion and benzyl dioxime in micellar media in the presence of sodium dodecyl sulfate (SIDS). The absorbance is linear from 0.1 up to 25.0 mu g mL(-1) in aqueous solution with repeatability (RSD) of 1.0% at a concentration of 1 mu g mL(-1) and a detection limit of 0.12 ng mL(-1) and molar absorption coefficient of 68,600 L mol(-1) cm(-1). The influence of reaction variables including type and amount of surfactant, pH, and amount of ligand and complexation time and the effect of interfering ions are investigated. The proposed procedure was applied to the determination of trace amounts of Ni(II) ion in tap water, river water, chocolate and vegetable without separation or organic solvent extraction. (c) 2006 Elsevier B.V All rights reserved.
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