Browsing by Author "Akçay M."
Now showing items 1-16 of 16
-
Determination of low levels of molybdenum (VI) in food samples and beverages by cloud point extraction coupled with flame atomic absorption spectrometry
Gürkan R.; Aksoy T.; Ulusoy H.T.; Akçay M. (2013)Cloud point extraction (CPE) was used for the preconcentration of molybdenum (Mo), after the formation of a complex with Victoria pure blue BO (VPB+) in presence of excess thiocyanate and cetylpyridinium chloride (CPC) at ... -
Determination of sodium and potassium in certified rock samples by AES after ultrasonic leaching
Özkan M.H.; Özkan A.; Gürkan R.; Akçay M. (2006)In order to evaluate the data obtained by atomic emission spectrometric analysis after ultrasonic extraction, destructive analysis of some certified rock samples employing ultrasonic waves was applied to two elements, Na ... -
The determination of some heavy metal cations by TLC/photodensitometry
Savaşci S.; Akçay M. (1996)The samples having complex matrices were analyzed for some heavy metal cations by using a thin layer chromatography/photodensitometry (TLC/PD) system. The rock samples were dissolved by suitable methods. Nickel, Cobalt and ... -
Determination of ultra trace arsenic species in water samples by hydride generation atomic absorption spectrometry after cloud point extraction
Ulusoy H.T.; Akçay M.; Ulusoy S.; Gürkan R. (2011)Cloud point extraction (CPE) methodology has successfully been employed for the preconcentration of ultra-trace arsenic species in aqueous samples prior to hydride generation atomic absorption spectrometry (HGAAS). As(III) ... -
Development of a cloud point extraction and preconcentration method for chromium(III) and total chromium prior to flame atomic absorption spectrometry
Ulusoy H.I.; Gürkan R.; YIlmaz Ö.; Akçay M. (2012)A sensitive and selective method has been developed for the determination of chromium in water samples based on using cloud point extraction (CPE) preconcentration and determination by flame atomic absorption spectrometry ... -
Development of a cloud point extraction and preconcentration method for determination of trace aluminum in mineral waters by FAAS
Ulusoy H.I.; Gürkan R.; Aksoy Ü.; Akçay M. (2011)A cloud point extraction (CPE) method has been developed for the preconcentration of trace aluminum prior to its determination by flame atomic absorption spectrometry (FAAS). The CPE method is based on the complex of Al(III) ... -
Inexpensive and versatile method for trace Sn(II) and Sn(IV) ions in food samples by CPE/FAAS
Ulusoy S.; Ulusoy H.I.; Akçay M.; Gürkan R. (2012)In this work, a new cloud point extraction procedure was developed for the separation and preconcentration of tin ions in water and food samples. The method is based on the complexation of Sn(IV) ions with calcon carboxylic ... -
Investigation of Pd-catalyzed Co(III)-EDTA/hypophosphite inhibition reaction kinetics, mechanism and the evaluation of its analytical application possibilities
Biçer N.; Gürkan R.; Akçay M.; Altunata T. (Serbian Chemical Society, 2004)The reaction between Co(III)-EDTA and hypophosphite ion, catalyzed by Pd(II) was chosen as the indicator reaction. The inhibition kinetics of this catalytic reaction have been investigated by a mechanistic approach in the ... -
Investigation of separation and indentification possibilities of some metal-dithizonate complexes by sequential TLC-IR system
Gürkan R.; Savaşci Ş.; Ozkan M.H.; Akçay M. (2005)The separation and identification possibilities of a number of metal-dithizonate complexes were investigated by means of a TLC-IR sequential system. Dithizonate complexes of some metal cations were pre-pared in a predetermined ... -
Kinetic spectrophotometric determination of trace amounts of selenium based on the catalytic reduction of maxilon blue-SG by sulfide
A simple and sensitive catalytic spectrophotometric method was developed for the determination of trace amounts of selenium. The method is based on the catalytic effect of selenium in form Se(IV) on the reduction of Maxilon ... -
Kinetic spectrophotometric determination of trace copper(II) ions by their catalytic effect on the reduction of brilliant cresyl blue by ascorbic acid
Ulusoy H.I.; Gürkan R.; Akçay M. (2011)In the present study, a novel catalytic-kinetic spectrophotometric method was developed for the determination of trace amounts of copper. It is based on the catalytic effect of Cu(II) on the reduction of brilliant cresyl ... -
A novel indicator system for catalytic spectrophotometric determination and speciation of inorganic selenium species (Se(IV), Se(VI)) at trace levels in natural lake and river water samples
Gürkan R.; Ulusoy H.I.; Akçay M.; Bulut P. (2011)A novel catalytic kinetic method is proposed for the determination of Se(IV), Se(VI), and total inorganic selenium in water based on the catalytic effect of Se(IV) on the reduction of Celestine blue by sodium sulfide at ... -
Photocatalytic degradation of a textile azo dye, Sirius Gelb GC on TiO 2 or Ag-TiO 2 particles in the absence and presence of UV irradiation: The effects of some inorganic anions on the photocatalysis
Özkan A.; Özkan M.H.; Gürkan R.; Akçay M.; Sökmen M. (2004)The aqueous phase photocatalytic degradation of Sirius Gelb GC used in the textile industry, was investigated. In order to optimize the working pH, three different dye solutions were prepared at pH 3.5; 7.0 and 11.0. One ... -
Solid phase extraction enrichment of pesticide mixtures from aqueous solutions: A quantitative FT-IR analysis
Akçay M.; Sökmen M.; Şeker Z.D. (2000)Solid phase extraction of ten commonly used pesticides on activated carbon has been investigated. Enrichment of these pesticides was successfully achieved at ppm levels and samples were then analysed using FT-IR. The ... -
Spatio-temporal change of heavy metal pollution in Sivas City [Sivas kenti'nde agir metal kirliliginin yerel ve zamansal degisimi]
The anthropogenic heavy metal pollution of Sivas city was traced at seven stations which had the characteristic properties of the city, spatially and temporally, during the summer seasons, between 1992-1994. The heavy ... -
Surfactant enhanced-spectrophotometric determination of uranium (VI) at trace levels by using eriochrome black T as a chelating agent
Gürkan R.; Ulusoy H.I.; Akçay M. (2011)A sensitive and relatively selective spectrophotometric method is proposed for the rapid determination of uranium using Eriochrome Black T (EBT) being a 2, 2'-dihydroxy azo benzene derivative metal indicator in the presence ...
