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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 10
BKCSDE 27(10)
October 20, 2006 
 
Title
 Solid Phase Extraction of Trace Cu(II), Mn(II), Pb(II) and Zn(II) in Water Samples with Pulverized Silica-salen(NEt2)2
Author
 Young-Sang Kim*, Gyo In, Jong-Moon Choi
Keywords
 Solid phase extraction, Silica-salen(NEt2)2, Trace elements, AAS, Trace elements
Abstract
 The use of chemically modified silica-salen(NEt2)2 was studied for the separation and concentration of the metal ions from an aqueous solution by a solid phase extraction. After the salen(NEt2)2 was synthesized, it was chemically bonded to silica gel by a diazonium coupling reaction. The adsorption capacities and binding constants were obtained with respect to Cu(II), Mn(II), Pb(II) and Zn(II) by a graphical method. Some experimental conditions were optimized for the determination of the trace elements. After the silicasalen(NEt2)2 was pulverized in a sample solution of which the pH was adjusted, the solution was stirred to preconcentrate the metal ions. The metal ions adsorbed were desorbed with nitric acid solution. And the concentrated analytes were determined by a flame AAS. The method proposed here was so rarely influenced by a sample matrix that the procedure was applied to 3 types of water samples. The reproducible results of less than 10% RSD were obtained at the concentration level of ca. 100 ng/mL and the recoveries of 95-109% were obtained in the spiked samples in which given amounts of analytes were added.
Page
 1557 - 1561
Full Text
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