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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 11
BKCSDE 27(11)
November 20, 2006

Title	Fundamental Study on Solvent Sublation Using Salphen and Its Application for Separative Determination of Trace Ni(II), Co(II) and Cu(II) in Water Samples
Author	Young-Sang Kim*, Gyo In, Mi-Hyun Kim, Jong-Moon Choi
Keywords	Solvent sublation, Salphen, Nickel(II), Cobalt(II), Copper(II)
Abstract	A solvent sublation using salphen as a ligand was studied and applied for the determination of trace Ni(II), Co(II) and Cu(II) in water samples. The fundamental study was investigated by a solvent extraction process because the solvent sublation was done by extracting the floated analytes into an organic solvent from the aqueous solution. The salphen complexes of Ni(II), Co(II) and Cu(II) ions were formed in an alkaline solution of more than pH 8 and then they were extracted into m-xylene. It was known that the each metallic ion formed 1 : 1 complex with the salphen and the logarithmic values of extraction constants for the complexes were 3.3 5.1 as an average value. Based on the preliminary study, the procedure was fixed for the separation and concentration of the analytes in samples. Various conditions such as the pH of solutions, the influence of NaClO₄, the bubbling rate and time of N₂ gas, and the type of organic solvent were optimized. The metalsalphen complexes could be extracted into m-xylene from the solution of more than pH 8, but the pH could be shifted to acidic solution of pH 6 by the addition of NaClO₄. In addition, the solvent sublation efficiency of the analytes was increased by adding NaClO₄. The recovery of 97-115% was obtained in the spiked samples in which given amounts of 0.3 mg/L Ni(II), 0.8 mg/L Co(II) and 0.04 mg/L Cu(II) were added.
Page	1757 - 1762
Full Text	PDF

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