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Mustafa Soylak - One of the best experts on this subject based on the ideXlab platform.
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thiomalic acid ferric chloride based Deep Eutectic Solvent for microextraction of chromium in natural water samples prior to faas analysis
International Journal of Environmental Analytical Chemistry, 2020Co-Authors: Mohamed A. Habila, Erkan Yilmaz, Eman A. Alabdullkarem, Zeid A. Alothman, Mustafa SoylakAbstract:Deep Eutectic Solvents have become interested green materials for microextraction applications. In this study, a novel Deep Eutectic Solvent have been formed by combination of thiomalic acid and fe...
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Deep Eutectic Solvent microextraction of lead ii cobalt ii nickel ii and manganese ii ions for the separation and preconcentration in some oil samples from turkey prior to their microsampling flame atomic absorption spectrometric determination
Microchemical Journal, 2019Co-Authors: Mustafa Soylak, Meltem KoksalAbstract:Abstract A new liquid phase microextraction method based on Deep Eutectic Solvent microextraction was developed for separation and preconcentration of lead, cobalt, nickel and manganese from edible oil samples like sunflower oil, baby oil, trout, waste frying oil and syrup-soaked pastry oil. A choline chloride Deep Eutectic Solvent was used for microextraction. After extraction, analytical concentrations were determined by flame atomic absorption spectrometry. Effects of analytical parameters such as type and volume of Deep Eutectic Solvent, sample volume, and temperature on extraction efficiency of lead, cobalt, nickel and manganese were optimized. The recoveries were generally >95%. The relative standard deviation (RSD, %, n = 7) of 50 μg/ L of analyte elements was in the range of 0.9–4.3%. Accuracy of presented microextraction method was checked by addition-recovery studies to oil samples. The presented Deep Eutectic Solvent microextraction method was finally applied to edible oil samples and waste oils with different properties for the determination of analyte contents.
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a novel and simple Deep Eutectic Solvent based liquid phase microextraction method for rhodamine b in cosmetic products and water samples prior to its spectrophotometric determination
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018Co-Authors: Erkan Yilmaz, Mustafa SoylakAbstract:Abstract A novel and green Deep Eutectic Solvent based liquid phase microextraction (DES-LPME) methodology has been proposed for the assessment of rhodamine B from cosmetic products and water samples. A Deep Eutectic Solvent (DES) consist of tetrabutyl ammonium chloride-decanoic acid (1:2) as extraction Solvent and tetrahydrofuran as emulsification agent were used for the microextraction of rhodamine B. The quantitative recoveries were achieved at pH 3 by using 0.3 mL of DES and 0.3 mL of THF. The rhodamine B concentration in last volume was analyzed by mirco-cuvette UV-VIS spectrophotometer at 550 nm. The limit of detection (LOD), limit of quantification (LOQ), preconcentration factor (PF) and relative standard deviation (RSD %) were found as 2.2 μg L−1, 7.3 μg L−1, 25 and 2.3%, respectively. Accuracy and validity of the developed method was verified by addition-recovery studies for water and cosmetic samples.
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vortex assisted Deep Eutectic Solvent des emulsification liquid liquid microextraction of trace curcumin in food and herbal tea samples
Food Chemistry, 2018Co-Authors: Funda Aydin, Erkan Yilmaz, Mustafa SoylakAbstract:Abstract We developed a new microextraction method for separation and preconcentration of curcumin using Deep Eutectic Solvent known as green Solvent. Deep Eutectic Solvent (DES) formed by mixing of choline chloride and phenol was used as an extraction Solvent in microextraction study to extract the curcumin at pH 4.0. The curcumin concentration in enriched DES phase was analyzed by UV–Visible spectrophotometer. The effect of parameters such as pH, mol ratio of DES composition, volume of DES, volume of tetrahydrofuran (THF) and sample volume were examined. Interference effects of matrix components were investigated. The preconcentration factor was 12.5. The detection limit of method (n = 10) was 2.86 µg L−1 and the relative standard deviation (RSD, n = 8) was 1.8%. The method was successfully applied to determination of curcumin in food and herbal tea samples. The mean recoveries were between 96% and 102% and standard deviations were found in the range of 1–6%.
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highly simple Deep Eutectic Solvent extraction of manganese in vegetable samples prior to its icp oes analysis
Biological Trace Element Research, 2017Co-Authors: Esra Bagda, Huseyin Altundag, Mustafa SoylakAbstract:In the present work, simple and sensitive extraction methods for selective determination of manganese have been successfully developed. The methods were based on solubilization of manganese in Deep Eutectic Solvent medium. Three Deep Eutectic Solvents with choline chloride (vitamin B4) and tartaric/oxalic/citric acids have been prepared. Extraction parameters were optimized with using standard reference material (1573a tomato leaves). The quantitative recovery values were obtained with 1.25 g/L sample to Deep Eutectic Solvent (DES) volume, at 95 °C for 2 h. The limit of detection was found as 0.50, 0.34, and 1.23 μg/L for DES/tartaric, DES/oxalic, and DES/citric acid, respectively. At optimum conditions, the analytical signal was linear for the range of 10–3000 μg/L for all studied DESs with the correlation coefficient >0.99. The extraction methods were applied to different real samples such as basil herb, spinach, dill, and cucumber barks. The known amount of manganese was spiked to samples, and good recovery results were obtained.
Erkan Yilmaz - One of the best experts on this subject based on the ideXlab platform.
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thiomalic acid ferric chloride based Deep Eutectic Solvent for microextraction of chromium in natural water samples prior to faas analysis
International Journal of Environmental Analytical Chemistry, 2020Co-Authors: Mohamed A. Habila, Erkan Yilmaz, Eman A. Alabdullkarem, Zeid A. Alothman, Mustafa SoylakAbstract:Deep Eutectic Solvents have become interested green materials for microextraction applications. In this study, a novel Deep Eutectic Solvent have been formed by combination of thiomalic acid and fe...
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a novel and simple Deep Eutectic Solvent based liquid phase microextraction method for rhodamine b in cosmetic products and water samples prior to its spectrophotometric determination
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2018Co-Authors: Erkan Yilmaz, Mustafa SoylakAbstract:Abstract A novel and green Deep Eutectic Solvent based liquid phase microextraction (DES-LPME) methodology has been proposed for the assessment of rhodamine B from cosmetic products and water samples. A Deep Eutectic Solvent (DES) consist of tetrabutyl ammonium chloride-decanoic acid (1:2) as extraction Solvent and tetrahydrofuran as emulsification agent were used for the microextraction of rhodamine B. The quantitative recoveries were achieved at pH 3 by using 0.3 mL of DES and 0.3 mL of THF. The rhodamine B concentration in last volume was analyzed by mirco-cuvette UV-VIS spectrophotometer at 550 nm. The limit of detection (LOD), limit of quantification (LOQ), preconcentration factor (PF) and relative standard deviation (RSD %) were found as 2.2 μg L−1, 7.3 μg L−1, 25 and 2.3%, respectively. Accuracy and validity of the developed method was verified by addition-recovery studies for water and cosmetic samples.
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vortex assisted Deep Eutectic Solvent des emulsification liquid liquid microextraction of trace curcumin in food and herbal tea samples
Food Chemistry, 2018Co-Authors: Funda Aydin, Erkan Yilmaz, Mustafa SoylakAbstract:Abstract We developed a new microextraction method for separation and preconcentration of curcumin using Deep Eutectic Solvent known as green Solvent. Deep Eutectic Solvent (DES) formed by mixing of choline chloride and phenol was used as an extraction Solvent in microextraction study to extract the curcumin at pH 4.0. The curcumin concentration in enriched DES phase was analyzed by UV–Visible spectrophotometer. The effect of parameters such as pH, mol ratio of DES composition, volume of DES, volume of tetrahydrofuran (THF) and sample volume were examined. Interference effects of matrix components were investigated. The preconcentration factor was 12.5. The detection limit of method (n = 10) was 2.86 µg L−1 and the relative standard deviation (RSD, n = 8) was 1.8%. The method was successfully applied to determination of curcumin in food and herbal tea samples. The mean recoveries were between 96% and 102% and standard deviations were found in the range of 1–6%.
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Deep Eutectic Solvent based ultrasonic assisted liquid phase microextraction for the faas determination of cobalt
Journal of Molecular Liquids, 2016Co-Authors: Erkan Yilmaz, Muhammad Balal Arain, Mustafa SoylakAbstract:Abstract A novel Deep Eutectic Solvent based ultrasound-assisted liquid phase microextraction (DES-UALPME) has introduced for preconcentration of cobalt. Deep Eutectic Solvents (DESs) are studied as a green and eco-friendly Solvents. In this method, 1-nitroso-2-naphthol was used as ligand. Cobalt concentration in DES rich phase was measured by a microsample injection system coupled with flame atomic absorption spectrometer (MS-FAAS). Under optimum conditions, LOD, LOQ, preconcentration factor (PF) and % RSD were determined as 1.10 μg L− 1, 3.60 μg L− 1, 15 and 7.1% respectively. The accuracy of the developed method was evaluated by the analysis of a pharmaceutical supplement and tea samples. Recoveries of certified reference materials and spiked samples were obtained in the range of 97–105%. Finally, the performance characteristics of the proposed method were compared with other liquid phase microextraction procedures.
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ultrasound assisted Deep Eutectic Solvent extraction of iron from sheep bovine and chicken liver samples
Talanta, 2015Co-Authors: Erkan Yilmaz, Mustafa SoylakAbstract:Abstract A green, novel and effective ultrasound assisted-Deep Eutectic Solvent (DES) extraction (UA-DES-E) procedure was developed for extraction of iron from sheep, bovine and chicken liver samples. The analytical parameters including type and composition DES, volume of DES, ultrasonication time and ratio of sample to DES were optimized by using 50 mg of the NIST SRM 1577b bovine liver certified reference material. The limit of detection (LOD) and the limit of quantification (LOQ) were found as 0.026 µg mL −1 and 0.085 µg mL −1 , respectively. The relative standard deviation (RSD) as a result of 7 replicates of 50 mg of certified reference material was 1.4%. The accuracy of proposed method was checked by the addition/recovery tests to NIST SRM 1577b bovine liver and a sheep liver. The extraction method was applied to extraction of iron from bovine, sheep and chicken liver samples retail from markets at Kayseri, Turkey with satisfactory results (recoveries higher than 95%).
Zhanhui Zhang - One of the best experts on this subject based on the ideXlab platform.
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Deep Eutectic Solvent based on choline chloride and malonic acid as an efficient and reusable catalytic system for one pot synthesis of functionalized pyrroles
ChemInform, 2015Co-Authors: Yuheng Liu, Zhenshui Cui, Zhanhui ZhangAbstract:A Deep Eutectic Solvent based on choline chloride and malonic acid is used as a dual catalyst and green reaction medium for the synthesis of a wide range of functionalized pyrroles by four-component reaction of various amines, aldehydes, 1,3-dicarbonyl compounds, and nitromethane.
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Deep Eutectic Solvent based on choline chloride and malonic acid as an efficient and reusable catalytic system for one pot synthesis of functionalized pyrroles
RSC Advances, 2015Co-Authors: Yuheng Liu, Zhenshui Cui, Zhanhui ZhangAbstract:A Deep Eutectic Solvent (DES) based on choline chloride and malonic acid was prepared easily with high purity at a low cost. It has been applied as a dual catalyst and reaction medium for the synthesis of functionalized pyrroles by a one-pot, four-component reaction of amines, aldehydes, 1,3-dicarbonyl compounds and nitromethane. This green Solvent could be recycled and reused three times without loss of its efficiency.
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l tartaric acid and choline chloride based Deep Eutectic Solvent an efficient and reusable medium for synthesis of n substituted pyrroles via clauson kaas reaction
Journal of Molecular Liquids, 2014Co-Authors: Ping Wang, Zhanhui ZhangAbstract:Abstract l -(+)-Tartaric acid–choline chloride based Deep Eutectic Solvent has been found to be an effective promoted medium for Clauson-Kaas reaction of aromatic amines and 2,5-dimethoxytetrahydrofuran. Structurally diverse N -substituted pyrroles were obtained in high to excellent yields under mild conditions. The Deep Eutectic Solvent is inexpensive, non-toxic, reusable and biodegradable.
Rhoda B Leron - One of the best experts on this subject based on the ideXlab platform.
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solubility of carbon dioxide in a choline chloride ethylene glycol based Deep Eutectic Solvent
Thermochimica Acta, 2013Co-Authors: Rhoda B LeronAbstract:Abstract The solubility of carbon dioxide in a Eutectic mixture containing choline chloride and ethylene glycol was determined for temperatures 303.15–343.15 K and pressures up to 6 MPa using a thermogravimetric microbalance. The effects of buoyancy on the experimental measurements were accounted for. Buoyancy corrections were estimated by using a highly accurate equation of state in the calculation of the density of carbon dioxide, and a Tait-type equation in estimating the density of the Deep Eutectic Solvent. An extended Henry's law equation was applied to accurately represent the solubility of carbon dioxide in the DES (in molality) as a function of temperature and pressure.
Grzegorz Boczkaj - One of the best experts on this subject based on the ideXlab platform.
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Solvent dependency of carbon dioxide henry s constant in aqueous solutions of choline chloride ethylene glycol based Deep Eutectic Solvent
Journal of Molecular Liquids, 2020Co-Authors: Ali Reza Harifimood, Fereshteh Mohammadpour, Grzegorz BoczkajAbstract:Abstract The Henry's constants of carbon dioxide absorbed in aqueous solutions of ethaline (choline chloride-ethylene glycol) were determined for temperatures ranging from 303.15 to 323.15 K based on solubility measurement at CO2 pressure ranging from 0 to 6 bar (0.6 MPa). These studies revealed that the Henry's constant increased with the increase of temperature. Data indicated the highest capacity of CO2 absorption is obtained for ethaline and the lowest temperature dependency of absorption capacity is reported for aqueous solution of ethaline based Deep Eutectic Solvent (0.3 mol fraction of water). The dependence of Henry's constant on Solvent composition and Solvent properties was investigated using preferential solvation model and linear free energy relationship method. Results showed that CO2 was preferentially solvated by ethaline in aqueous solution. Furthermore it revealed that solute-Solvent interactions related to the scale of hydrogen bond donor ability of the Solvent were the main parameter which controls the solubility of CO2 in the studied system. Presented methodology is useful for selection of best absorbent composition for systems of hot off-gases treatment. Interesting and practical results obtained in this work, indicated that precisely selected composition of the Deep Eutectic Solvent based absorbent provide low sensitivity of the treatment performance in respect to the temperature of the treated gas.
