Sibel Saracoglu
Erciyes University
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Featured researches published by Sibel Saracoglu.
Talanta | 2005
Mustafa Soylak; Sibel Saracoglu; Umit Divrikli; Latif Elci
Trace amounts of copper, manganese, cobalt, chromium, iron and lead were quantitatively coprecipitated with erbium hydroxide on 0.05M NaOH medium. The coprecipitant could be easily dissolved with 1M nitric acid. The presence of up to 15g/l of erbium ions did not interfere with the atomic absorption spectrometric determination of analyte ions. The recovery values for analyte ions were higher than 95%. The concentration factor was 25-fold. Coprecipitation parameters including reagent amounts and matrix effects are discussed. The relative standard deviations of the determinations were below 9%. The time required for the coprecipitation was about 30min. The proposed method was successfully applied for the determination of trace amounts of analyte ions in urine, soil and sediment, natural water samples.
Talanta | 2003
Sibel Saracoglu; Mustafa Soylak; Latif Elci
Multi-element determination of trace elements in urine and dialysis solutions by atomic absorption spectrometry has been investigated. Coprecipitation with samarium hydroxide was used for preconcentration of trace elements and elimination of matrix elements. To 10 ml of each sample was added 500 mul of 2 mgml(-1) samarium solutions; the pH was then adjusted to 12.2 in order to collect trace heavy metals on samarium hydroxide. The precipitate was separated by centrifugation and dissolved in 1 ml of 1 moll(-1) HNO(3). Coprecipitation parameters and matrix effects are discussed. The precision, based on replicate analysis, is around 5% for the analytes, and recovery is quantitative, based on analysis of spiked samples and solutions including matrix components. The time required for the coprecipitation and determination was about 30 min.
Journal of Hazardous Materials | 2009
Sibel Saracoglu; Mustafa Tuzen; Mustafa Soylak
The trace and toxic elements (TEs) were determined in apricot samples by flame and graphite furnace atomic absorption spectrometry, prior to microwave-assisted acid digestion. Among all determined TEs, iron was found to be the dominant elemental ion as compared with other TEs in apricots followed by zinc and manganese ions. The concentration of essential TEs were observed in the range of 10.4-80.1, 0.92-6.49, 0.97-8.27, 2.96-12.0 microg g(-1), 4.76-28.9 microg kg(-1) and 0.32-0.64 microg g(-1) for iron, copper, manganese, zinc, chromium and selenium ions, respectively. While the toxic elemental contents were observed in the range of 0.02-0.72, 0.72-3.77, 2.30-5.83 and 0.08-0.22 microg g(-1) for cadmium, lead, nickel and aluminium ions, respectively. The results were compared with the literature reported values.
Talanta | 1998
Latif Elci; Sibel Saracoglu
A magnesium hydroxide coprecipitation technique for determination of Cd, Co, Cu, Mn, Ni in dialysis concentrate is described. The analytes are concentrated from 10 ml of dialysis concentrate into 1 ml of 1 M HNO(3) and subsequently determined by graphite furnace atomic absorption spectrometry. Coprecipitation parameters and matrix effects are discussed. The precision, based on replicate analysis, is around 5% for the analytes, and recovery is quantitative, based on analysis of spiked samples and solutions including matrix components.
Analytical Letters | 2002
Sibel Saracoglu; Mustafa Soylak; Latif Elci
ABSTRACT An on-line solid phase extraction system has been established for flow injection flame atomic absorption spectrometric determination of chromium on Chromotrope 2R coated Amberlite XAD-1180 (2R-1180) resin. Some parameters such as pH, flow rates of sample and elution solution, matrix effects on the quantitative recoveries of chromium from the resin were examined. The detection limit (3σ) was 2.59 µg/L for preconcentration at 6.5 mL/min. The method was applied for the determination of traces chromium in natural water samples with satisfactory results (relative standard deviations below 5%, recoveries >95%).
Analytical Letters | 2004
Mustafa Soylak; Ibrahim Narin; Umit Divrikli; Sibel Saracoglu; Latif Elci; Mehmet Dogan
Abstract The preconcentration performance characteristics of cellulose nitrate membrane filter were investigated for the atomic absorption spectrometric determinations of traces metal ions in the environmental samples. The method was optimized for several parameters, including buffer pH, matrix, and type of the membrane. The investigated analyte ions were collected on cellulose nitrate membrane filter as their 8‐hydroxyquinoline (8‐HQ) (oxine) complexes. Then membrane filter was dissolved by using small amounts of concentrated nitric acid. The levels of copper, iron, cobalt, and cadmium ions in the final solutions were determined by flame atomic absorption spectrometry (FAAS). The recoveries of analytes were generally in the range of 94–102%. No influences have been observed from the matrix of the natural water samples. The presented procedure was applied for the determinations of analyte ions contents of natural waters, some ammonium salts, and microwave digested black tea samples with satisfactory results. The relative standard deviations of the determinations were below 9%. The method was verified by the analysis of two reference standard materials (GBW 07309 stream sediment and NRCC‐SLRS‐4 Riverine Water).
International Journal of Environmental Analytical Chemistry | 2002
Mustafa Soylak; Sibel Saracoglu; Latif Elci; Mehmet Dogan
A preconcentration/separation method for the atomic absorption spectrometric determinations of Cu(II), Ni(II) and Pb(II) ions in seawater have been established by using a chromatographic column filled Amberlite XAD-1180. The recoveries of Cu(II), Ni(II) and Pb(II) ions were quantitative (> 95%) at pH 8-9. The influences of the various analytical parameters including the amount of calmagite, amount of Amberlite XAD-1180, eluent type, etc. were investigated. The influence of the seawater matrix was also examined. Simultaneous enrichment and determination of copper, nickel and lead ions in seawater are possible with satisfactory results (recoveries > 95%, RSD <9%).
Food and Chemical Toxicology | 2010
Sibel Saracoglu; Mustafa Soylak
A simple, rapid and sensitive separation/pre-concentration procedure for Cd(II), Cr(III), Co(II), Cu(II), Fe(III), Pb(II) and Mn(II) ions in environmental samples has been established. The present procedure is based on a combination of carrier element-free coprecipitation (CEFC) and flame atomic absorption spectrometric (FAAS) determinations of understudy trace metal ions. A cationic surfactant (N-cetyl N,N,N trimethyl ammonium bromide (CTAB)) as coprecipitant was used without adding any carrier element for coprecipitation of understudy ions. The optimum conditions for the coprecipitation process were investigated on several commonly tested experimental parameters, such as pH of the solution, amount of coprecipitant. The pre-concentration factor was found to be 10. The detection limits corresponding to three times the standard deviation of the blank (N=20) for Cd(II), Cr(III), Co(II), Cu(II), Fe(III), Pb(II) and Mn(II) ions were found as 0.61, 16.8, 12.7, 1.36, 2.08, 4.30 and 0.22 microg L(-1), respectively. The present procedure was successfully applied for separation and pre-concentration of investigated ions in several liquid environmental samples. In order to support the accuracy of the method, the certified reference materials (BCR 141 R calcareous loam soil and CRM025-050 soil) were analyzed. The experimental results are in good agreement with the certified values.
Journal of Trace and Microprobe Techniques | 2003
Sibel Saracoglu; Umit Divrikli; Mustafa Soylak; Latif Elci; Mehmet Dogan
Abstract The trace heavy metal contents of twenty four textile samples produced in Turkey have been determined by atomic absorption spectrometry (AAS) after separation/preconcentration procedures including solid phase extraction and coprecipitation. The levels of the investigated ions in textile material were found to be below the values given by Oeko-Tex with some exceptions for lead and nickel for baby clothing.
Analytical Letters | 2002
Sibel Saracoglu; Mustafa Soylak; Latif Elci; Mehmet Dogan
ABSTRACT A solid phase extraction method for the preconcentration and atomic absorption spectrometric determination of Cu, Fe, Ni, Co, Pb, Cd, Mn, and Cr in natural water samples using Chromosorb-102 packed mini column was developed. Trace metal ions were sorbed on Chromosorb-102 at pH 9 from buffered solution with NH3/NH4Cl buffer and then eluted with 5–10 mL of 1 M HNO3. The recoveries of analyte metal ions were more than 95%. The effects of major cations and anions of the natural water samples on the sorption of metal ions have been also investigated. The amount of the analyte metal ions detected after preconcentration was basically in agreement with the added amount. The present method was found to be applicable to the preconcentration of Cu, Fe, Ni, Co, Pb, Cd, Mn, and Cr in tap and sea waters with good results such as relative standard deviations in the range of 3–8% (N = 10), recoveries greater than 95%.