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1.
Preconcentration of Cadmium Using Solid Phase Extraction by
Dimethylglyoxime -Modified Silica gel and Flame Atomic
Absorption Spectrophotometric Determination
Burcu Anilan1*, Tevfik Gedikbey2
1Department of Chemistry Education, Faculty of
Education, Eskižehir Osmangazi University, 26480, Eskižehir,
Turkey
2Department of Chemistry, Faculty of Arts and
Science, Eskižehir Osmangazi University, 26480, Eskižehir,
Turkey
*Correspondending author: Burcu Anilan, Department of
Chemistry Education, Faculty of Education, Eskižehir Osmangazi
University, Campus of Meželik, 26480, Eskižehir, Turkey, Tel:
+90-222-2393750/1656
Fax: +90-222-2293124, E-mail address:
burcud@ogu.edu.tr
Abstract:
This work describes the modification of silica gel with
dimethylglyoxime in order to prepare an effective sorbent
for the preconcentration and determination of cadmium. A new
solid phase extraction method for the preconcentration of
Cd(II) has been developed using a minicolumn filled with
DMGMS. The best eluent was determined as hydrochloric acid
and after the preconcentration process, the Cd(II) ions has
been determined by FAAS. The solution pH, amount of
adsorbent, the flow rate of the sample solution, type and
concentration of the eluent, eluent volume and sample volume
have been optimized. The effect of interfering ions on the
recovery of the analytes has also been investigated. The
adsorption capacities of DMGMS for Cd(II) ions was 68.49 mg
g-1. The recoveries for Cd(II) ions under the
optimum preconcentration conditions was 99±1
% at the 95 % confidence level. The detection limits was
found as 16.8 ng mL1. The developed method is
applied to various real water samples. The accuracy of the
method was confirmed by analyzing the certified reference
material (CRM024050).
Keywords: Preconcentration, cadmium(II), dimethylglyoxime-
modified silicagel, Flame atomic absorption spectroscopy
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