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Sezgin Bakirdere - One of the best experts on this subject based on the ideXlab platform.
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Ultrasonic assisted glass bead loaded gas liquid separator-photochemical vapor generation-T-shaped slotted Quartz Tube-flame atomic absorption spectrophotometry system for antimony determination in tap water and wastewater samples
Chemical Papers, 2020Co-Authors: Elif Yazici, Cagdas Buyukpinar, Süleyman Bodur, Nevim San, Okan Tarik Komesli, Sezgin BakirdereAbstract:In this study, optimization and validation of ultrasonic assisted glass bead loaded gas liquid separator-photochemical vapor generation-T-shaped slotted Quartz Tube-flame atomic absorption spectrophotometry (UA-GLS-PVG-T-SQT-FAAS) system was performed for the determination of antimony in real samples. Volatile derivatives of antimony were generated and separated from liquid matrix by combination of a UV photoreactor and gas–liquid separation. Optimization of all variable parameters which effect volatile compound generation and separation efficiency such as low molecular weight organic acid type and concentration, ultraviolet irradiation period, gas–liquid separator design, carrier gas flow rate and sample volume were evaluated one at a time keeping the others constant. Limit of detection and quantification were calculated as 47 and 157 µg L^–1, respectively. Detection power of the developed method was enhanced about 58 folds compared to conventional FAAS system over LOD comparison. In addition, applicability/accuracy of the developed method was checked by spiking experiments in tap and wastewater samples and percent recovery results were found in the range 83.4–106.4%.
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A Simultaneous Dispersive Liquid–Liquid Microextraction-complexation Method to Determine Trace Cobalt in Chamomile Tea Extract Prior to Slotted Quartz Tube Flame Atomic Absorption Spectrometry
Chemistry Letters, 2020Co-Authors: Emine Gülhan Bakırdere, Nur Azize Akarçay, Buse Tuğba Zaman, Sezgin BakirdereAbstract:A novel and effective analytical method was developed for the determination of trace cobalt by slotted Quartz Tube flame atomic absorption spectrometry (SQT-FAAS) after simultaneous dispersive liqu...
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determination of indium in lettuce samples using hydrogen supported t cut slotted Quartz Tube atom trap flame atomic absorption spectrometry
Chemistry Letters, 2020Co-Authors: Fatih Kapukiran, Ozge Yilmaz, Zeynep Tekin, Cagdas Buyukpinar, Nizamettin Ozdogan, Sezgin BakirdereAbstract:In the present method, detection power of flame atomic absorption spectrophotometry (FAAS) was increased by utilizing a T-cut-slotted Quartz Tube (T-SQT) and combining with atom trap and hydrogen s...
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determination of vitamin b12 and cobalt in egg yolk using vortex assisted switchable solvent based liquid phase microextraction prior to slotted Quartz Tube flame atomic absorption spectrometry
Food Chemistry, 2019Co-Authors: Zeynep Tekin, Sezin Erarpat, Dotse Selali Chormey, Ayse şahin, Sezgin BakirdereAbstract:Abstract A switchable solvent based liquid phase microextraction (SS-LPME) has been proposed for the determination of cobalt in egg yolk and Vitamin B12 at trace levels. N,N-Dimethylbenzylamide (DMBA) was used as a switchable solvent and converted to protonated DMBA form by the addition of dry ice. Cobalt was complexed with 1,5-diphenylcarbazone (DPC) and extracted into the DMBA phase. After the extraction, HNO3 was added to increase nebulization efficiency of the DMBA phase. Slotted Quartz Tube (SQT) was combined with FAAS to enhance the detection power of the system when compared to the conventional FAAS. Under the optimum conditions, limit of detection values were recorded as 75 µg L−1 for FAAS, 33 µg L−1 for SQT-FAAS, 7.6 µg L−1 for SS-LPME-FAAS, and 2.3 µg L−1 for SS-LPME-SQT-FAAS. The developed method was applied for the determination of cobalt in egg yolk and Vitamin B12 and the recovery results were found in the range of 105–114% with 0.30–7.6 standard deviation values (n = 3).
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Magnetic cobalt particle–assisted solid phase extraction of tellurium prior to its determination by slotted Quartz Tube-flame atomic absorption spectrophotometry
Environmental Monitoring and Assessment, 2019Co-Authors: Nizamettin Ozdogan, Fatih Kapukiran, Elif Öztürk Er, Sezgin BakirdereAbstract:The emergence of magnetic materials has opened up doors to numerous applications including their use as sorbents for preconcentration of trace elements. Magnetic materials exhibit many unique advantages in sample preparation such as easy separation from the sample, high preconcentration factor, and short operation period. In the present study, magnetic cobalt material was synthesized, characterized, and used as an effective sorbent in a solid phase extraction process. Experimental variables of the extraction process including pH and volume of buffer solution, eluent concentration and volume, mixing type and period, and sorbent amount were optimized to achieve maximum extraction efficiency. Instrumental variables of flame atomic absorption spectrophotometry and the type of slotted Quartz Tube were also investigated. Under the optimum conditions, the combined method provided a wide linear range between 50 and 200 ng/mL with detection and quantification limits of 15.4 ng/mL and 51.3 ng/mL, respectively. Relative standard deviations of the proposed method were less than 5.0% and a high enrichment factor of 86.7 was obtained. The proposed method was successfully applied to soil samples for the determination of trace tellurium.
Dotse Selali Chormey - One of the best experts on this subject based on the ideXlab platform.
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determination of vitamin b12 and cobalt in egg yolk using vortex assisted switchable solvent based liquid phase microextraction prior to slotted Quartz Tube flame atomic absorption spectrometry
Food Chemistry, 2019Co-Authors: Zeynep Tekin, Sezin Erarpat, Dotse Selali Chormey, Ayse şahin, Sezgin BakirdereAbstract:Abstract A switchable solvent based liquid phase microextraction (SS-LPME) has been proposed for the determination of cobalt in egg yolk and Vitamin B12 at trace levels. N,N-Dimethylbenzylamide (DMBA) was used as a switchable solvent and converted to protonated DMBA form by the addition of dry ice. Cobalt was complexed with 1,5-diphenylcarbazone (DPC) and extracted into the DMBA phase. After the extraction, HNO3 was added to increase nebulization efficiency of the DMBA phase. Slotted Quartz Tube (SQT) was combined with FAAS to enhance the detection power of the system when compared to the conventional FAAS. Under the optimum conditions, limit of detection values were recorded as 75 µg L−1 for FAAS, 33 µg L−1 for SQT-FAAS, 7.6 µg L−1 for SS-LPME-FAAS, and 2.3 µg L−1 for SS-LPME-SQT-FAAS. The developed method was applied for the determination of cobalt in egg yolk and Vitamin B12 and the recovery results were found in the range of 105–114% with 0.30–7.6 standard deviation values (n = 3).
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Determination of Bismuth in Bottled and Mineral Water Samples at Trace Levels by T-Shaped Slotted Quartz Tube-Atom Trap-Flame Atomic Absorption Spectrometry
Analytical Letters, 2018Co-Authors: Süleyman Bodur, Cagdas Buyukpinar, Sezin Erarpat, Dotse Selali Chormey, Sezgin BakirdereAbstract:AbstractAn accurate and reliable analytical method for the determination of bismuth at trace levels in bottled and mineral water samples has been developed based on hydrogen assisted T-shape slotted Quartz Tube-atom trap-flame atomic absorption spectrometry (T-SQT-AT-FAAS). Conventional FAAS is not sufficiently sensitive to measure trace and ultra-trace levels of metals due to the low nebulization efficiency and short residence time of atoms in the light path. To overcome this problem, atom trapping with a T-shaped slotted Quartz Tube was coupled to the FAAS system. Bismuth atoms were trapped on the surface of T-SQT and released by hydrogen gas, which provided a reducing environment. All of the system parameters such as flame type, hydrogen flow rate, the height of T-SQT from the burner head, and trapping period were optimized to enhance the analytical signal to attain low detection limits. After obtaining the optimum conditions, the limit of detection and limit of quantitation of the developed method wer...
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Development and Validation of a Sensitive Method for Trace Nickel Determination by Slotted Quartz Tube Flame Atomic Absorption Spectrometry After Dispersive Liquid-Liquid Microextraction.
Bulletin of Environmental Contamination and Toxicology, 2018Co-Authors: Şükran Melda Yolcu, Cagdas Buyukpinar, Dotse Selali Chormey, Merve Fırat, Fatma Turak, Sezgin BakirdereAbstract:In this study, dispersive liquid–liquid microextraction was systematically optimized for the preconcentration of nickel after forming a complex with diphenylcarbazone. The measurement output of the flame atomic absorption spectrometer was further enhanced by fitting a custom-cut slotted Quartz Tube to the flame burner head. The extraction method increased the amount of nickel reaching the flame and the slotted Quartz Tube increased the residence time of nickel atoms in the flame to record higher absorbance. Two methods combined to give about 90 fold enhancement in sensitivity over the conventional flame atomic absorption spectrometry. The optimized method was applicable over a wide linear concentration range, and it gave a detection limit of 2.1 µg L−1. Low relative standard deviations at the lowest concentration in the linear calibration plot indicated high precision for both extraction process and instrumental measurements. A coal fly ash standard reference material (SRM 1633c) was used to determine the accuracy of the method, and experimented results were compatible with the certified value. Spiked recovery tests were also used to validate the applicability of the method.
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determination of cadmium in tap sea and waste water samples by vortex assisted dispersive liquid liquid solidified floating organic drop microextraction and slotted Quartz Tube faas after complexation with a imidazole based ligand
Water Air and Soil Pollution, 2018Co-Authors: Maral Selin Fındıkoğlu, Dotse Selali Chormey, Merve Fırat, Fatma Turak, Cigdem şahin, Sezgin BakirdereAbstract:This study presents a combination of dispersive liquid-liquid-solidified floating organic drop microextraction (DLLSFODM) and slotted Quartz Tube (SQT) with conventional flame atomic absorption spectrometry (FAAS) to improve the sensitivity for cadmium determination. A ligand namely 2-(4-methylphenyl)-1H-imidazo-[4,5-f]-[1,10]-phenanthroline which has not been used in trace analyte determination was used to form a cadmium complex. Stepwise optimization of parameters affecting complex formation (pH, ligand, and buffer solution) and extraction (extraction and dispersive solvents, salt effect and mixing) was done to maximize cadmium absorbance. The slotted Quartz Tube was fitted onto the flame burner and optimized to increase residence time of atoms in the flame. Instrumental parameters such as sample and fuel flow rate were also optimized to further enhance the absorbance signal for cadmium. Using optimal parameters and values, the limits of detection and quantification were determined to be 0.81 and 2.69 μg L−1, respectively. Low percent relative standard deviations (< 6.0%) indicated good precision for both extraction and instrumental measurements. Recovery tests were used to determine the accuracy of the method and the recovery results obtained were between 88 and 113%.
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Sensitive determination of cadmium in lake water, municipal wastewater and onion samples by slotted Quartz Tube-flame atomic absorption spectrometry after preconcentration with microextraction strategy
Measurement, 2018Co-Authors: Emine Betül Kafa, Merve Fırat, Dotse Selali Chormey, Fatma Turak, Sezgin BakirdereAbstract:Abstract This study presents the coupling of slotted Quartz Tube with flame atomic absorption spectrometry for the determination of cadmium after preconcentration with dispersive liquid–liquid microextraction. A bipyridine ligand was used to form covalent cadmium complex, and the formation yield was increased by optimizing parameters such as pH/amount of buffer solution and ligand concentration. Parameters that influence the extraction output and slotted Quartz Tube efficiency were also optimized to increase the sensitivity. The optimization steps added up to give about 135 times increased sensitivity in comparison to the conventional flame atomic absorption spectrometry. The limits of detection and quantification obtained under optimum experimental conditions were 0.31 and 1.04 µg L−1, respectively. Applicability of the method was tested on lake water, municipal wastewater and onion samples spiked at different concentrations. Percentage recoveries were found to be between 84 and 105% for the samples, and matrix matching was used to obtain 98.6% recovery for onion spiked at 20 µg L−1.
Cagdas Buyukpinar - One of the best experts on this subject based on the ideXlab platform.
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Ultrasonic assisted glass bead loaded gas liquid separator-photochemical vapor generation-T-shaped slotted Quartz Tube-flame atomic absorption spectrophotometry system for antimony determination in tap water and wastewater samples
Chemical Papers, 2020Co-Authors: Elif Yazici, Cagdas Buyukpinar, Süleyman Bodur, Nevim San, Okan Tarik Komesli, Sezgin BakirdereAbstract:In this study, optimization and validation of ultrasonic assisted glass bead loaded gas liquid separator-photochemical vapor generation-T-shaped slotted Quartz Tube-flame atomic absorption spectrophotometry (UA-GLS-PVG-T-SQT-FAAS) system was performed for the determination of antimony in real samples. Volatile derivatives of antimony were generated and separated from liquid matrix by combination of a UV photoreactor and gas–liquid separation. Optimization of all variable parameters which effect volatile compound generation and separation efficiency such as low molecular weight organic acid type and concentration, ultraviolet irradiation period, gas–liquid separator design, carrier gas flow rate and sample volume were evaluated one at a time keeping the others constant. Limit of detection and quantification were calculated as 47 and 157 µg L^–1, respectively. Detection power of the developed method was enhanced about 58 folds compared to conventional FAAS system over LOD comparison. In addition, applicability/accuracy of the developed method was checked by spiking experiments in tap and wastewater samples and percent recovery results were found in the range 83.4–106.4%.
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determination of indium in lettuce samples using hydrogen supported t cut slotted Quartz Tube atom trap flame atomic absorption spectrometry
Chemistry Letters, 2020Co-Authors: Fatih Kapukiran, Ozge Yilmaz, Zeynep Tekin, Cagdas Buyukpinar, Nizamettin Ozdogan, Sezgin BakirdereAbstract:In the present method, detection power of flame atomic absorption spectrophotometry (FAAS) was increased by utilizing a T-cut-slotted Quartz Tube (T-SQT) and combining with atom trap and hydrogen s...
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Sensitive and Accurate Determination of Cobalt at Trace Levels by Slotted Quartz Tube-Flame Atomic Absorption Spectrometry Following Preconcentration with Dispersive Liquid–Liquid Microextraction
Analytical Letters, 2018Co-Authors: Serenay Deniz, Cagdas Buyukpinar, Aylin Kasa, Sabriye Sel, Sezgin BakirdereAbstract:AbstractSlotted Quartz Tube-flame atomic absorption spectrometry (SQT-FAAS) was used as a sensitive technique for the determination of cobalt, an element has toxic effects on living organisms at hi...
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Determination of Bismuth in Bottled and Mineral Water Samples at Trace Levels by T-Shaped Slotted Quartz Tube-Atom Trap-Flame Atomic Absorption Spectrometry
Analytical Letters, 2018Co-Authors: Süleyman Bodur, Cagdas Buyukpinar, Sezin Erarpat, Dotse Selali Chormey, Sezgin BakirdereAbstract:AbstractAn accurate and reliable analytical method for the determination of bismuth at trace levels in bottled and mineral water samples has been developed based on hydrogen assisted T-shape slotted Quartz Tube-atom trap-flame atomic absorption spectrometry (T-SQT-AT-FAAS). Conventional FAAS is not sufficiently sensitive to measure trace and ultra-trace levels of metals due to the low nebulization efficiency and short residence time of atoms in the light path. To overcome this problem, atom trapping with a T-shaped slotted Quartz Tube was coupled to the FAAS system. Bismuth atoms were trapped on the surface of T-SQT and released by hydrogen gas, which provided a reducing environment. All of the system parameters such as flame type, hydrogen flow rate, the height of T-SQT from the burner head, and trapping period were optimized to enhance the analytical signal to attain low detection limits. After obtaining the optimum conditions, the limit of detection and limit of quantitation of the developed method wer...
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a novel analytical method for sensitive determination of lead hydrogen assisted t shape slotted Quartz Tube atom trap flame atomic absorption spectrometry
Microchemical Journal, 2018Co-Authors: Humeysa Uslu, Cagdas Buyukpinar, Fatma Turak, Tugce Unutkan, Hakan Serbest, Nevin San, Sezgin BakirdereAbstract:Abstract Lead is a toxic metal which affects human health badly due to its high toxicity. The wide application range of lead causes environmental contamination of air, water and soil. Flame atomic absorption spectrometry is one of the simple and economical instrument used for the determination of heavy metals, but it has low sensitivity due to low sample introduction efficiency. In this study, a sensitive analytical method was developed by using T-shaped slotted Quartz Tube as an atom trap unit to get lower detection limit for lead. The trapped atoms were released using hydrogen gas which supplies reducing environment in T-SQT-AT-FAAS system. Factors such as trapping period, sample and fuel flow rates were optimized to obtain high sensitivity. Under the optimum conditions, limits of detection and quantitation were found to be 0.6 and 2.1 μg L− 1, respectively. Accuracy of the developed method was checked and results found under the optimum conditions agreed with the certified value of coal fly ash standard reference material. The developed method was applied to water samples to figure out its suitability.
Yavuz O Ataman - One of the best experts on this subject based on the ideXlab platform.
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sensitive determination of bismuth by flame atomic absorption spectrometry using atom trapping in a slotted Quartz Tube and revolatilization with organic solvent pulse
Spectrochimica Acta Part B: Atomic Spectroscopy, 2012Co-Authors: Ersin Kılınç, Sezgin Bakirdere, Firat Aydin, Yavuz O AtamanAbstract:Abstract Sensitivity of flame atomic absorption spectrometry (FAAS) for Bi determination was improved by slotted Quartz Tube (SQT) that was used also for atom trapping (AT). The trapped analyte was released by aspirating a small volume of organic solvent after a reasonable analyte collection time. Sensitivity was improved by 2.9 times by SQT-FAAS and 256 times by SQT-AT-FAAS with respect to FAAS. Optimum trapping period was found to be 6.0 min (36.0 mL of solution). Limit of detection (LOD) for SQT-AT-FAAS was found to be 1.6 ng mL− 1. %RSD was calculated as 4.0% for five replicate measurements of 7.5 ng mL− 1 Bi by SQT-AT-FAAS. Accuracy of the method developed was checked by analyzing a standard reference material of simulated fresh water (NIST 1643e) and result found was in good agreement with the certified one. The method can be applied in any laboratory equipped with a flame AA spectrometer. The consumption of time and sample volume is fairly low and application is simple and easy.
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indium determination using slotted Quartz Tube atom trap flame atomic absorption spectrometry and interference studies
Talanta, 2011Co-Authors: Yasin Arslan, Erdal Kenduzler, Yavuz O AtamanAbstract:Abstract Sensitivity enhancement of indium determination by flame atomic absorption spectrometry (FAAS) was achieved; using a slotted Quartz Tube (SQT-FAAS) and slotted Quartz Tube atom trap (SQT-AT-FAAS). SQT was used as an atom trap (AT) where the analyte is accumulated in its inner wall prior to re-atomization. The signal is formed after re-atomization of analyte on the trap surface by introduction of 10 μL of isobutyl methyl ketone (IBMK). Sensitivity was improved 400 times using SQT-AT-FAAS system with respect to conventional FAAS and 279 times with respect to SQT-FAAS without any collection. Characteristic concentration (C0) and limit of detection values were found to be 3.63 ng mL−1 and 2.60 ng mL−1, respectively, using a sample flow rate of 7.0 mL min−1 and a collection period of 5.0 min. In addition, interference effects of some elements on indium signal were studied. In order to characterize indium species trapped, X-ray Photoelectron Spectrometry (XPS) was utilized and it was found that indium was collected on the inner surface of SQT as In2O3. The accuracy of the procedure was checked to determine indium in the standard reference material (Montana Soil, SRM 2710).
Sezin Erarpat - One of the best experts on this subject based on the ideXlab platform.
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determination of vitamin b12 and cobalt in egg yolk using vortex assisted switchable solvent based liquid phase microextraction prior to slotted Quartz Tube flame atomic absorption spectrometry
Food Chemistry, 2019Co-Authors: Zeynep Tekin, Sezin Erarpat, Dotse Selali Chormey, Ayse şahin, Sezgin BakirdereAbstract:Abstract A switchable solvent based liquid phase microextraction (SS-LPME) has been proposed for the determination of cobalt in egg yolk and Vitamin B12 at trace levels. N,N-Dimethylbenzylamide (DMBA) was used as a switchable solvent and converted to protonated DMBA form by the addition of dry ice. Cobalt was complexed with 1,5-diphenylcarbazone (DPC) and extracted into the DMBA phase. After the extraction, HNO3 was added to increase nebulization efficiency of the DMBA phase. Slotted Quartz Tube (SQT) was combined with FAAS to enhance the detection power of the system when compared to the conventional FAAS. Under the optimum conditions, limit of detection values were recorded as 75 µg L−1 for FAAS, 33 µg L−1 for SQT-FAAS, 7.6 µg L−1 for SS-LPME-FAAS, and 2.3 µg L−1 for SS-LPME-SQT-FAAS. The developed method was applied for the determination of cobalt in egg yolk and Vitamin B12 and the recovery results were found in the range of 105–114% with 0.30–7.6 standard deviation values (n = 3).
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Determination of Bismuth in Bottled and Mineral Water Samples at Trace Levels by T-Shaped Slotted Quartz Tube-Atom Trap-Flame Atomic Absorption Spectrometry
Analytical Letters, 2018Co-Authors: Süleyman Bodur, Cagdas Buyukpinar, Sezin Erarpat, Dotse Selali Chormey, Sezgin BakirdereAbstract:AbstractAn accurate and reliable analytical method for the determination of bismuth at trace levels in bottled and mineral water samples has been developed based on hydrogen assisted T-shape slotted Quartz Tube-atom trap-flame atomic absorption spectrometry (T-SQT-AT-FAAS). Conventional FAAS is not sufficiently sensitive to measure trace and ultra-trace levels of metals due to the low nebulization efficiency and short residence time of atoms in the light path. To overcome this problem, atom trapping with a T-shaped slotted Quartz Tube was coupled to the FAAS system. Bismuth atoms were trapped on the surface of T-SQT and released by hydrogen gas, which provided a reducing environment. All of the system parameters such as flame type, hydrogen flow rate, the height of T-SQT from the burner head, and trapping period were optimized to enhance the analytical signal to attain low detection limits. After obtaining the optimum conditions, the limit of detection and limit of quantitation of the developed method wer...
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determination of lead at trace levels in mussel and sea water samples using vortex assisted dispersive liquid liquid microextraction slotted Quartz Tube flame atomic absorption spectrometry
Chemosphere, 2017Co-Authors: Sezin Erarpat, Dotse Selali Chormey, Gozde Ozzeybek, Sezgin BakirdereAbstract:In this study, dispersive liquid-liquid microextraction (DLLME) and slotted Quartz Tube (SQT) were coupled to flame atomic absorption spectrometry (FAAS) to increase the sensitivity of lead. Conditions such as the formation of the lead-dithizone complex, efficiency of the DLLME method and the output of the SQT were systematically optimized to improve the detection limit for the analyte. The conventional FAAS system was improved upon by about 3.0 times with SQT-FAAS, 32 times with DLLME-FAAS and 142 times with DLLME-SQT-FAAS. The method was applicable over a wide linear range (10-500 μg L-1). The limit of detection (LOD) determined by DLLME-SQT-FAAS for seawater and mussel were 2.7 μg L-1 and 270 μg kg-1, respectively. The percent recoveries obtained for mussel and seawater samples (spiked at 20 and 50 μg L-1) were 95-96% and 98-110%, respectively.
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sensitive determination of copper in water samples using dispersive liquid liquid microextraction slotted Quartz Tube flame atomic absorption spectrometry
Microchemical Journal, 2017Co-Authors: Gozde Ozzeybek, Cagdas Buyukpinar, Sezin Erarpat, Dotse Selali Chormey, Merve Fırat, Fatma Turak, Sezgin BakirdereAbstract:Abstract Determination of trace amount of copper in environmental samples is necessary due to its toxic properties and dangers to living organisms. Dispersive liquid-liquid microextraction (DLLME) was coupled with slotted Quartz Tube (SQT) to lower the detection limit for copper using flame atomic absorption spectrometry (FAAS). Parameters affecting the formation of copper-ligand complex, DLLME efficiency and SQT output were systematically optimized to improve copper detection signal. The SQT-FAAS, DLLME-FAAS and DLLME-SQT-FAAS systems were 2, 42 and 79 times, respectively, more sensitive than the conventional FAAS system. The limit of detection (LOD) and quantitation (LOQ) values obtained for the combined methods (DLLME-SQT-FAAS) were calculated as 0.7 and 2.2 μg L − 1 , respectively. The method recorded appreciable recoveries for all samples tested (78%–99%), and experimental results of a certificated references material (EU-L-2) agreed with the certified value.