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Öğe A Comparative Study for Separation, Preconcentration and Determination of Tartrazine (E 102) in Soft Drink Samples by Two Kinds of Amberlite Resins(SPRINGER, 2015) Bisgin, Abdullah Taner; Ucan, Mustafa; Narin, Ibrahim; Soylak, MustafaSeparation, preconcentration, and spectrophotometric determination of tartrazine (E 102) was performed by solid-phase extraction methods with using spectrophotometry. For this purpose, Amberlite XAD-1180 and Amberlite XAD-16 resins and mini-chromatographic column were used. All absorbance measurements of the dye were determined at 427 nm. Analytical parameters including pH, sample and eluent flow rates, eluent type, ionic strength, sample volume, and adsorption isotherms were investigated and optimized. Under optimum condition interference effect of main cations, some anions and widely used dyes were examined. Detection limits of the proposed methods were determined as 5.7 and 1.2 mu g L-1 for XAD-1180 and XAD-16 resins, respectively. Linear dynamic ranges of the methods were found between 0.4-30 and 0.4-12 mu g mL(-1) of tartrazine for XAD-1180 and XAD-16 resins, respectively. The preconcentration factors were found as 60 and 80 for XAD-1180 and XAD-16 columns, respectively. Relative standard deviations were lower than 7 % throughout all experiments for two methods. Developed methods were validated and checked with determination of tartrazine levels in soft drink samples by addition of analyte. The comparisons of the methods were performed by the analysis of tartrazine contents of food samples. Tartrazine concentrations, investigated solid samples, ranged between 146 and 391 mu g/g. Tartrazine content of liquid sample was found as 7.4 and 7.3 mu g/mL for X1180 and X16 methods, respectively. The results suggest that the methods are suitable for the determination of tartrazine. Very accurate results were obtained for spiked values of the tartrazine into the food samples. In addition to accuracy, the method is simple, environmental friendly, and economical for the determination of tartrazine level in food samples. In addition of analytical parameters, adsorption and isotherm studies were performed for two kinds of Amberlite resins. It was observed that the methods fitted the linear form of Freundlich isotherm model.Öğe Cloud point extraction procedure for flame atomic absorption spectrometric determination of lead(II) in sediment and water samples(SPRINGER WIEN, 2007) Surme, Yavuz; Narin, Ibrahim; Soylak, Mustafa; Yuruk, Huseyin; Dogan, MehmetThe conditions for cloud point extraction of lead(II) from aqueous solutions were investigated and optimized. The procedure is based on the separation of Pb(II) - brillant cresyl blue (BCB) complexes into the micellar media by adding the surfactant Triton X-114. After phase separation, the surfactant-rich phase was dissolved with 1 mol L-1 HNO3 in ethanol and diluted with 1 mol L-1 HNO3 solution before lead was determined by flame atomic absorption spectrometry. Optimization of the pH, ligand and surfactant quantities, incubation time, temperature, viscosity, sample volume, and interfering ions was performed. The effects of the matrix ions were also examined. The detection limits for three times the standard deviations of the blank for lead were 7.5 mu g L-1 for water samples and 0.33 mu g g(-1) for sediment samples. The validity of cloud point extraction was checked by employing certified reference samples of Lake Sediment IAEA-SL-1 and Sewage Sludge BCR-CRM 144R. The procedure was applied to natural waters and sediment samples with satisfactory results (recoveries > 95%, relative standard deviations < 6.4%).Öğe Determination and evaluation of Cu, Mn, Zn, Cd, Pb and Ni contents in wild-grown edible mushroom species from Cappadocia, Turkey(2021) Narin, İbrahim; Bişgin, Abdullah Taner; Tuzen, Mustafa; Uçan, Mustafa; Mendil, Durali; Soylak, MustafaThe aim of this study was to determine the Cu, Mn, Zn, Cd, Pb and Ni concentrations in sixteen different wild-grown edible mushroom species grown in Niğde and Nevşehir. In the sample preparation step, the samples were dried, ground and sieved by 200 meshed sieve, consecutively. The extractions of metals were conducted by acid mineralization using concentrated nitric acid and hydrogen peroxide in microwave digestion unit. The determinations of metals were performed by flame atomic absorption spectrometry. Among the mushroom samples that were analyzed, Cu, Mn, Zn, Cd, Pb, and Ni concentrations were determined in the range of 6.7-1353, 4.7-109, 44.8-406, 0.14-6.4, 4.28-25.6 and 1.7-11.0 mg/kg, respectively. The accuracy and precision of the proposed method for metal determinations were validated by using the NIST SRM 1573a Tomato Leaves certified standard material. The obtained results were evaluated in terms of human health and compared with each other and previously reported values in the literature. In addition, the habitats of the mushroom samples were identified.Öğe Heavy metal contents of the Karasu creek sediments, Nigde, Turkey(SPRINGER, 2007) Yalcin, M. Gurhan; Narin, Ibrahim; Soylak, MustafaHeavy metal contamination in sediments of the Karasu spring was investigated in the presented study. In this respect, sediment samples were collected from contaminant sites along the spring starting from the spring water manifestation site, base of the Akkaya dam to the dam exit site. Heavy metal concentrations were determined by X-ray Fluorescence Spectrometer. Cobalt, copper, arsenic, tin, nickel, zinc, cadmium, lead, aluminum, iron, titan, chromium and manganese contents of the Karasu creek sediments are found as 18.30-69.00, 12.40-595.0 5.50-345.3, 5.80-15.1, 10.9-64.1, 28.90-103,300, 4.1-356.2, 7.70-37,840, 13,460-109,400, 11,740-62,900, 22.18-59.04, 41.70-369 and 12.09-3,480 mg/kg, respectively. Results indicate the presence of a contamination in the Karasu creek. All the metal concentrations were found to be exceeding their acceptable limit values. Eutrophication is developed in the Karasu creek and the Akkaya dam. It is thought that heavy metal accumulation in the creek is originated from discharge from mine quarries, industrial and domestic wastes. Protection zones should be defined and all necessary measures must be taken along the Karasu creek.Öğe Multivariate analysis of heavy metal contents of sediments from Gumusler creek, Nigde, Turkey(SPRINGER, 2008) Yalcin, M. Gurhan; Narin, Ibrahim; Soylak, MustafaIn this study, heavy metal contents of samples from Gumusler creek in Turkey were studied and the metal contamination characteristics were investigated. In this respect, considering the pollutant sites in the area, systematic sediment samples were collected in a zone starting from the manifestation part of the water to the entrance of the Karasu creek in Gumusler town. Samples were taken from lower section of the river bed at 30 stations along Gumusler creek, 13 km in length and their heavy metal contents were analyzed with XRF Spectrometer. Correlation coefficients, element coefitic coefficient correlation, dendogram hierarchical cluster, model summary and Annova analysis statistical methods were applied to data. Strong positive correlations were determined for some elements which are believed to have possibly the same origin. In addition, mineralizations in the area are thought to cause variation in metal contents. Results of chemical analysis show that soil limit values and clark values were exceeded. The heavy metal accumulation in the creek is believed to be derived from non-operated Sb-Hg-W and Fe quarries.Öğe Polypyrrole/multi-walled carbon nanotube composite for the solid phase extraction of lead(II) in water samples(ELSEVIER SCIENCE BV, 2014) Sahmetlioglu, Ertugrul; Yilmaz, Erkan; Aktas, Ece; Soylak, MustafaA multi-walled carbon nanotubes-polypyrrole conducting polymer nanocomposite has been synthesized, characterized and used for the separation and preconcentration of lead at trace levels in water samples prior to its flame atomic absorption spectrometric detection. The analytical parameters like pH, sample volume, eluent, sample flow rate that were affected the retentions of lead(II) on the new nanocomposite were optimized. Matrix effects were also investigated. Limit of detection and preconcentration factors were 1.1 mu g L-1 and 200, respectively. The adsorption capacity of the nanocomposite was 25.0 mg lead(II) per gram composite. The validation of the method was checked by using SPS-WW2 Waste water Level 2 certified reference material. The method was applied to the determination of lead in water samples with satisfactory results. (C) 2013 Elsevier B.V. All rights reserved.Öğe Preparation and characterization of magnetic allylamine modified graphene oxide-poly(vinyl acetate-co-divinylbenzene) nanocomposite for vortex assisted magnetic solid phase extraction of some metal ions(ELSEVIER SCIENCE BV, 2016) Khan, Mansoor; Yilmaz, Erkan; Sevinc, Basak; Sahmetlioglu, Ertugrul; Shah, Jasmin; Jan, Muhammad Rasul; Soylak, MustafaMagnetic allylamine modified graphene oxide-poly(vinyl acetate-co-divinylbenzene) (MGO-DVB-VA) was synthesized and used for magnetic solid phase extraction of Pb(II), Cd(II), Cu(II), Ni(II) and Co(II) prior to their determination by flame atomic absorption spectroscopy. The adsorbent surface functional group was characterized by using FT-IR and Raman spectroscopy. XRD pattern was used to determine the layers of GO. Surface morphology and elemental composition of the adsorbent were evaluated by using SEM and EDX analysis. Various parameters, effecting adsorption efficiency like initial solution pH, adsorbent dose, type and volume of eluent, volume of sample and diverse ions effects were optimized. The preconcentration factor (PF) is 40 for all the metals and the limits of detection for Pb, Cd, Cu, Ni and Co are in the range of 037-239 mu g L-1 and relative standard deviation below 3.1%. The method was validated by using the method for certified reference materials (Tobacco Leaves (INCT-OBTL-5), Tomato Leaves (1573a), Certified Water (SPS-ww2) and Certified Water (TMDA 64-2)). The method was successfully applied for natural water and food samples. (C) 2015 Elsevier B.V. All rights reserved.Öğe SP70-alpha-benzoin oxime chelating resin for preconcentration-separation of Pb(II), Cd(II), Co(II) and Cr(III) in environmental samples(ELSEVIER SCIENCE BV, 2007) Narin, Ibrahim; Surme, Yavuz; Bercin, Erdogan; Soylak, MustafaIn the presented work, a-benzoin oxime immobilized SP70 chelating resin was synthesized for separation and preconcentration of Pb(II), Cd(II), Co(II) and Cr(III). The optimization procedure for analytical parameters including pH, eluent type, flow rate, etc. was examined in order to gain quantitative recoveries of analyte ions. The effects of foreign ions on the recoveries of studied metal ions were also investigated. The detection limits Q(T) were found to be 16.0, 4.2, 1.3, 2.4 mu g L-1 for Pb, Cd, Co and Cr, respectively. The preconcentration factor was 75 for Ph, 100 for Cd, Co and Cr. The optimized method was validated with certified reference materials and successfully applied to the waters, crops and pharmaceutical samples with good results (recoveries greater than 95%, R.S.D. lower than 10%). (c) 2006 Elsevier B.V. All rights reserved.Öğe Speciation of Cr(III) and Cr(VI) in environmental samples by solid phase extraction on Ambersorb 563 resin(ELSEVIER SCIENCE BV, 2006) Narin, Ibrahim; Surme, Yavuz; Soylak, Mustafa; Dogan, MehmetA simple and sensitive method for the speciation, separation and preconcentration of Cr(VI) and Cr(III) in natural water, soil and sediment samples was developed. Cr(VI) has been separated from Cr(III) and preconcentrated as Cr(III)-diphenylcarbazone complex by using Ambersorb 563 resin and determined by spectrophotometric method at 540 nm. Effect of analytical parameters such as sulfuric acid concentration, ligand volume, type of elution solution, sample volume, amount of resin and foreign ions were investigated. The presented procedure was successfully applied for the chromium speciation in various environmental samples with successfully results. (c) 2005 Elsevier B.V. All rights reserved.
