عنوان مقاله :
Preconcentration of cobalt by modified clinoptilolite with N,N′-1,2-cyclohexylene bis(salicylidene amine) and its determination by flame atomic absorption spectrometry
پديدآورندگان :
Zamani H Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran , Faghihian H Department of Chemistry, University of Isfahan, Isfahan, Iran , Haji shabani A. M Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran , Dadfarnia S Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran , Abdollahi M Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran
كليدواژه :
Clinoptilolite , Flame atomic absorption spectrometry , Cobalt preconcentration , Solid phase extraction
چكيده لاتين :
A simple, highly sensitive, accurate and selective method for the determination of trace amounts of Co2+
from aqueous media is proposed. The procedure is based on the adsorption of Co2+ on clinoptilolite zeolite
modified by N,N′-1,2-cyclohexylene bis(salicylidene amine) at pH 6. The retained cobalt on the column was
eluted with 5 ml 1 M HNO3 in ethanol and measured by flame atomic absorption spectrometry. The
influence of aqueous phase pH, type of eluent, flow rates of sample solution and eluent, volume of eluent and
the presence of other cations were envestigated. A preconcentration factor of 140 can be achieved by passing
700 ml of sample through the column. The proposed method was applied to the determination of cobalt in
water samples.
