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Voltammetric Determination of Nickel in the Flow System in the Presence of an Extremely Large Excess of Cobalt and Zinc
Author(s) -
Korolczuk Mieczysław
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200012)12:18<1502::aid-elan1502>3.0.co;2-8
Subject(s) - dimethylglyoxime , nickel , cobalt , zinc , chemistry , stripping (fiber) , inorganic chemistry , detection limit , metal , buffer solution , analytical chemistry (journal) , materials science , chromatography , organic chemistry , composite material
A voltammetric method of nickel determination in the presence of an extremely large excess of cobalt and zinc was proposed. The method is based on a selective deposition of nickel to the metallic state from KSCN solution, then its oxidation to Ni(II) in the presence of dimethylglyoxime with complex formation. The complex is adsorbed onto the electrode and in the stripping step is reduced in an ammonium buffer solution. The measurements were performed in the flow system in the presence of dissolved oxygen. The detection limit for Ni(II) in the presence of 0.01 mol L –1 of Co(II) or in the presence of 0.1 mol L –1 Zn(II) were 1.2×10 –9 and 1.3×10 –9 mol L – 1 , respectively.