Pub Date : 2023-12-18DOI: 10.51435/turkjac.1381022
Hüseyin Baş, Z. Bıyıklıoğlu
In this study, the new phthalonitrile derivative, axially di- and peripherally tetra-(4-{[(1E)-(4-methoxyphenyl)methylene]amino}phenoxy) group substituted metallophthalocyanines have been synthesized and characterized. Then electrochemical measurements of axially di- and peripherally tetra-(4-{[(1E)-(4-methoxyphenyl)methylene]amino}phenoxy) group substituted metallophthalocyanines were investigated with cyclic voltammogram (CV) technique. Phthalocyanine ring based redox processes are recorded owing to the redox inactivity of the Si4+, Cu2+ central cation of NP2-Si, NP2-Cu. NP2-Mn demonstrated both metal-based and Pc ring-based reduction processes, in contrast to NP2-Si and NP2-Cu.
{"title":"Synthesis of axially di- and peripherally tetra-(4-{[(1E)-(4-methoxyphenyl)methylene]amino}phenoxy) group substituted metallophthalocyanines and their electrochemistry","authors":"Hüseyin Baş, Z. Bıyıklıoğlu","doi":"10.51435/turkjac.1381022","DOIUrl":"https://doi.org/10.51435/turkjac.1381022","url":null,"abstract":"In this study, the new phthalonitrile derivative, axially di- and peripherally tetra-(4-{[(1E)-(4-methoxyphenyl)methylene]amino}phenoxy) group substituted metallophthalocyanines have been synthesized and characterized. Then electrochemical measurements of axially di- and peripherally tetra-(4-{[(1E)-(4-methoxyphenyl)methylene]amino}phenoxy) group substituted metallophthalocyanines were investigated with cyclic voltammogram (CV) technique. Phthalocyanine ring based redox processes are recorded owing to the redox inactivity of the Si4+, Cu2+ central cation of NP2-Si, NP2-Cu. NP2-Mn demonstrated both metal-based and Pc ring-based reduction processes, in contrast to NP2-Si and NP2-Cu.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"79 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139175315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-17DOI: 10.51435/turkjac.1397465
A. Vural
The Kısacık gold deposit is situated in the Biga Peninsula, Northwest Anatolia, Türkiye. The aim of this study is to investigate the genetic relationship between the Kısacık gold deposit and the surrounding rocks using trace element and rare earth element (REE) geochemistry. The results show that the gold mineralizations in the Kısacık area have a compatible pattern with the Alakeçi-Kısacık Volcanics and the Kuşçayırı plutonic rocks in the near vicinity of the area. The gold mineralizations in the Kısacık area are consistent with the trace and rare earth element (REE) patterns of the upper continental and lower continental crust, as shown by comparison with spider diagrams normalized to different geological settings. The gold enrichments in the listvenites and ultramafic rocks in the area are also consistent with the trace and REE element patterns of these rock types. The results of this study support the conclusion that the gold mineralization in the Kısacık area is related to hydrothermal fluids that leached elements from the Alakeçi-Kısacık Volcanics. In addition, hydrothermal fluids from plutonic rocks were also effective in the mineralization process. These results suggest that the gold mineralization in the Kısacık area is related to hydrothermal fluids that leached elements from the Alakeçi-Kısacık Volcanics.
{"title":"Geochemical evaluation of the genetic relationship of Kısacık (Ayvacık, Çanakkale/Türkiye) epithermal gold mineralization using trace and rare earth elements","authors":"A. Vural","doi":"10.51435/turkjac.1397465","DOIUrl":"https://doi.org/10.51435/turkjac.1397465","url":null,"abstract":"The Kısacık gold deposit is situated in the Biga Peninsula, Northwest Anatolia, Türkiye. The aim of this study is to investigate the genetic relationship between the Kısacık gold deposit and the surrounding rocks using trace element and rare earth element (REE) geochemistry. The results show that the gold mineralizations in the Kısacık area have a compatible pattern with the Alakeçi-Kısacık Volcanics and the Kuşçayırı plutonic rocks in the near vicinity of the area. The gold mineralizations in the Kısacık area are consistent with the trace and rare earth element (REE) patterns of the upper continental and lower continental crust, as shown by comparison with spider diagrams normalized to different geological settings. The gold enrichments in the listvenites and ultramafic rocks in the area are also consistent with the trace and REE element patterns of these rock types. The results of this study support the conclusion that the gold mineralization in the Kısacık area is related to hydrothermal fluids that leached elements from the Alakeçi-Kısacık Volcanics. In addition, hydrothermal fluids from plutonic rocks were also effective in the mineralization process. These results suggest that the gold mineralization in the Kısacık area is related to hydrothermal fluids that leached elements from the Alakeçi-Kısacık Volcanics.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"361 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138966605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-16DOI: 10.51435/turkjac.1390923
Z. Can, Y. Kara, Halil İbrahim Güler, C. Birinci, S. Kolaylı
This study investigated that the acetylcholinesterase, urease enzyme inhibition and these enzymes molecular docking as well as antioxidant activity of commercially available amygdalin. While Amygdalin displayed effect anti-urease activity compared to acetohydroxamic acid but, anti-acetylcholine esterase activity a little ineffective compared to donepezil. The molecular docking was performed in order to check binding interactions between the amygdalin and the enzymes. DPPH and FRAP assays were preferred to determine the antioxidant activity. The antioxidant activity (3.39±0.33 µmol Fe2SO47H2O /g, SC50 18.74±0.72 mg/mL using the FRAP and DPPH assays, respectively. Amygdalin's in vitro and in vivo studies are needed for demonstrated that is a therapeutic agent for the treatment of various diseases.
{"title":"Molecular docking study on acetylcholinesterase and urease enzyme inhibition effects of Amygdalin","authors":"Z. Can, Y. Kara, Halil İbrahim Güler, C. Birinci, S. Kolaylı","doi":"10.51435/turkjac.1390923","DOIUrl":"https://doi.org/10.51435/turkjac.1390923","url":null,"abstract":"This study investigated that the acetylcholinesterase, urease enzyme inhibition and these enzymes molecular docking as well as antioxidant activity of commercially available amygdalin. While Amygdalin displayed effect anti-urease activity compared to acetohydroxamic acid but, anti-acetylcholine esterase activity a little ineffective compared to donepezil. The molecular docking was performed in order to check binding interactions between the amygdalin and the enzymes. DPPH and FRAP assays were preferred to determine the antioxidant activity. The antioxidant activity (3.39±0.33 µmol Fe2SO47H2O /g, SC50 18.74±0.72 mg/mL using the FRAP and DPPH assays, respectively. Amygdalin's in vitro and in vivo studies are needed for demonstrated that is a therapeutic agent for the treatment of various diseases.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"18 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-16DOI: 10.51435/turkjac.1387506
A. Nas, Gülsev Di̇lber, Z. Bıyıklıoğlu
In this study, 1-benzylpiperidin-4-oxy substituted non-peripheral and peripheral metal free (3, 7), chloro manganese (III) (4, 8), oxotitanium (IV) (5, 9) and Cu(II) (6, 10) phthalocyanine complexes are synthesized and electrochemical properties were examined. Novel phthalocyanines compounds have been characterized by Fourier transform infrared, electronic spectroscopy, and mass spectra. Electrochemistry of non-peripherally and peripherally tetra-[(1-benzylpiperidine-4-yl)oxy] substituted metal-free and metallophthalocyanines were investigated by cyclic voltammetry (CV). Owing to the redox inactivity of the metal-free and Cu2+ ion of H2Pcs (3, 7) and CuPcs (6, 10), Pc based reductions and oxidation processes are recorded. Unlike, electrochemical analyses showed that MnPcs (4, 8) and TiPcs (5, 9) illustrated metal based redox processes in addition to the Pc ring based reactions.
{"title":"Electrochemical properties of non-peripherally and peripherally tetra-[(1-benzylpiperidine-4-yl)oxy] substituted phthalocyanines","authors":"A. Nas, Gülsev Di̇lber, Z. Bıyıklıoğlu","doi":"10.51435/turkjac.1387506","DOIUrl":"https://doi.org/10.51435/turkjac.1387506","url":null,"abstract":"In this study, 1-benzylpiperidin-4-oxy substituted non-peripheral and peripheral metal free (3, 7), chloro manganese (III) (4, 8), oxotitanium (IV) (5, 9) and Cu(II) (6, 10) phthalocyanine complexes are synthesized and electrochemical properties were examined. Novel phthalocyanines compounds have been characterized by Fourier transform infrared, electronic spectroscopy, and mass spectra. Electrochemistry of non-peripherally and peripherally tetra-[(1-benzylpiperidine-4-yl)oxy] substituted metal-free and metallophthalocyanines were investigated by cyclic voltammetry (CV). Owing to the redox inactivity of the metal-free and Cu2+ ion of H2Pcs (3, 7) and CuPcs (6, 10), Pc based reductions and oxidation processes are recorded. Unlike, electrochemical analyses showed that MnPcs (4, 8) and TiPcs (5, 9) illustrated metal based redox processes in addition to the Pc ring based reactions.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-06DOI: 10.51435/turkjac.1333631
C. S. Keskin, Ceren AYNA ÇAKIR, Hüseyin Altundağ, Nil Toplan, H. Toplan
The corrosion degrees of produced non-activated and activated cordierite-based ceramics were investigated in hydrochloric and sulfuric acid solutions. The composition of talc, alumina, and kaolinite powders was mechanically activated in a planetary mill. The concentrations of aluminum, magnesium, silicon, calcium, and potassium leached to the acid solutions from non-activated and activated cordierites were measured using ICP-OES. The amorphization of the structures was examined by XRD analysis. As a result, it has been determined that activated cordierite-based ceramics are more durable, and sulfuric acid solution causes more corrosion than hydrochloric acid.
{"title":"The effects of mechanical activation on corrosion resistance of cordierite ceramics","authors":"C. S. Keskin, Ceren AYNA ÇAKIR, Hüseyin Altundağ, Nil Toplan, H. Toplan","doi":"10.51435/turkjac.1333631","DOIUrl":"https://doi.org/10.51435/turkjac.1333631","url":null,"abstract":"The corrosion degrees of produced non-activated and activated cordierite-based ceramics were investigated in hydrochloric and sulfuric acid solutions. The composition of talc, alumina, and kaolinite powders was mechanically activated in a planetary mill. The concentrations of aluminum, magnesium, silicon, calcium, and potassium leached to the acid solutions from non-activated and activated cordierites were measured using ICP-OES. The amorphization of the structures was examined by XRD analysis. As a result, it has been determined that activated cordierite-based ceramics are more durable, and sulfuric acid solution causes more corrosion than hydrochloric acid.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"252 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139288253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-04DOI: 10.51435/turkjac.1364599
Sercan Yıldırım
Dеtеrmination of nonsteroidal anti-inflammatory drugs (NSAIDs) in pharmacеutical formulations hеlps to еnsurе that thеy arе manufacturеd to thе corrеct spеcifications. Consequently, simple, reliable, and environmentally friendly analytical methods are needed for the quality control of NSAID formulations. In this study, a novel and green liquid chromatographic method was developed for the determination of nimesulide (NIM) and naproxen (NAP) in gel formulations by employing ethanol as a green alternative to hazardous methanol and acetonitrile. The high viscosity of ethanol was compensated by employing a Chromolith HighResolution RP18e monolithic column (100 × 4.6 mm) with low flow resistance. Box-Behnken design with desirability function was employed for the optimization of selected significant parameters: pH (2.8-4), ethanol ratio in the mobile phase (35-55%), and flow rate (0.7-1.5 mL/min). Under optimum conditions, satisfactory separation of analytes was achieved within 5 min. Calibration curves for both analytes were linear between 1-50 μg/mL. Accuracies of intra- and inter-day experiments at low-, middle-, and high-quality control levels ranged from 99.0-101.5% with relative standard deviation values lower than 2.3%. The limits of detection were 0.27 and 0.62 µg/mL for NIM and NAP, respectively. The applicability of the method was demonstrated by analyzing gel formulations. The results of this study indicated that monolithic columns in combination with ethanol as a mobile phase component could be considered a desirable and green alternative for the routine analysis of NSAIDs in quality control laboratories.
{"title":"A green liquid chromatographic method using ethanol in mobile phase for the determination of nimesulide and naproxen in gel formulations","authors":"Sercan Yıldırım","doi":"10.51435/turkjac.1364599","DOIUrl":"https://doi.org/10.51435/turkjac.1364599","url":null,"abstract":"Dеtеrmination of nonsteroidal anti-inflammatory drugs (NSAIDs) in pharmacеutical formulations hеlps to еnsurе that thеy arе manufacturеd to thе corrеct spеcifications. Consequently, simple, reliable, and environmentally friendly analytical methods are needed for the quality control of NSAID formulations. In this study, a novel and green liquid chromatographic method was developed for the determination of nimesulide (NIM) and naproxen (NAP) in gel formulations by employing ethanol as a green alternative to hazardous methanol and acetonitrile. The high viscosity of ethanol was compensated by employing a Chromolith HighResolution RP18e monolithic column (100 × 4.6 mm) with low flow resistance. Box-Behnken design with desirability function was employed for the optimization of selected significant parameters: pH (2.8-4), ethanol ratio in the mobile phase (35-55%), and flow rate (0.7-1.5 mL/min). Under optimum conditions, satisfactory separation of analytes was achieved within 5 min. Calibration curves for both analytes were linear between 1-50 μg/mL. Accuracies of intra- and inter-day experiments at low-, middle-, and high-quality control levels ranged from 99.0-101.5% with relative standard deviation values lower than 2.3%. The limits of detection were 0.27 and 0.62 µg/mL for NIM and NAP, respectively. The applicability of the method was demonstrated by analyzing gel formulations. The results of this study indicated that monolithic columns in combination with ethanol as a mobile phase component could be considered a desirable and green alternative for the routine analysis of NSAIDs in quality control laboratories.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139289424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.51435/turkjac.1311200
P. Şen, P. Bolouri, F. Şahin
The emergence of antimicrobial resistance has necessitate the new approaches. The peppermint (Mentha piperita L.) (PEO) oil is known for its antimicrobial and antifungal activities. However, the employing of it in practial applications is troublesome because of the sensitivity to the environmental conditions. Thus, it was immolized into chitosan to eliminate the difficulties in its use and increase its activity. It was observed that the immobilization of the PEO into the chitosan (PEO@Chitosan) influenced the biological activities resulting in less minimum Minimum Inhibitory Concentration (MIC) values in addition to protecting the essential oil by the chitosan as environment-friendly biomaterial. The determined MIC values of the target product (PEO@Chitosan) are between 0.001-0.95 mg/mL for the studied bacterial strains and 0.006-0.36 mg/mL for the studied fungi isolates, which led us to consider them as new therapeutic alternative. In vitro antiviral studies gave us that even if the encapsulation of the essential oil into the chitosan made the prepared product still promising as acandidate for the antiviral therapy treatment.
抗菌素耐药性的出现使新方法成为必要。薄荷(Mentha piperita L.) (PEO)油以其抗菌和抗真菌活性而闻名。然而，由于其对环境条件的敏感性，在实际应用中应用起来比较麻烦。因此，将其包埋在壳聚糖中，以消除其使用困难，提高其活性。结果表明，壳聚糖(PEO@Chitosan)对PEO的固定化对其生物活性有一定的影响，使其具有较低的最小抑制浓度(MIC)，同时壳聚糖作为环保型生物材料对精油有保护作用。目标产物(PEO@Chitosan)的MIC值在0.001 ~ 0.95 mg/mL之间，真菌的MIC值在0.006 ~ 0.36 mg/mL之间，可以作为一种新的治疗选择。体外抗病毒研究告诉我们，即使将精油包封在壳聚糖中，所制备的产品仍有希望作为抗病毒治疗的候选药物。
{"title":"Improvement of in vitro antimicrobial and antifungal activities of peppermint essential oil conjugated with chitosan and promising antiviral properties","authors":"P. Şen, P. Bolouri, F. Şahin","doi":"10.51435/turkjac.1311200","DOIUrl":"https://doi.org/10.51435/turkjac.1311200","url":null,"abstract":"The emergence of antimicrobial resistance has necessitate the new approaches. The peppermint (Mentha piperita L.) (PEO) oil is known for its antimicrobial and antifungal activities. However, the employing of it in practial applications is troublesome because of the sensitivity to the environmental conditions. Thus, it was immolized into chitosan to eliminate the difficulties in its use and increase its activity. It was observed that the immobilization of the PEO into the chitosan (PEO@Chitosan) influenced the biological activities resulting in less minimum Minimum Inhibitory Concentration (MIC) values in addition to protecting the essential oil by the chitosan as environment-friendly biomaterial. The determined MIC values of the target product (PEO@Chitosan) are between 0.001-0.95 mg/mL for the studied bacterial strains and 0.006-0.36 mg/mL for the studied fungi isolates, which led us to consider them as new therapeutic alternative. In vitro antiviral studies gave us that even if the encapsulation of the essential oil into the chitosan made the prepared product still promising as acandidate for the antiviral therapy treatment.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123210236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.51435/turkjac.1296586
S. Yıldız, Sami Dursun
Today's environmental and living conditions necessitate reconsideration of traditional cotton fabric bleaching processes. For this reason, it is very important for the environment and the economy to obtain higher whiteness values by using less water and chemicals in bleaching. Sodium chlorite (NaClO2), the source of chlorine dioxide (ClO2) as the most important disinfectant, which gained popularity and availability during the COVID-19 pandemic, is an appropriate oxidant for the purpose. Using NaClO2 as bleaching agent has significant advantages, such as reducing the amount of washing proses and increasing of cotton strength. Another advantage of this reagent is that it causes less fabric weight loss than other reagents. Therefore, the present work was intended to improve the process conditions (different temperatures, concentrations, and times) of bleaching of cotton fabric by using NaClO2. Optimum temperature and time were determined as 30 min at 65 °C and 30 min at 85 °C, and a high whiteness index (W.I.=88) was obtained by using phosphonic acid (HEDP). Moreover, the tensile strength, weight loss and morphologies of the samples were examined. It has been observed that sodium chlorite causes little damage to cotton fibers and requires less water for rinsing since it does not form alkaline residues.
{"title":"The investigation of the effect of sodium chlorite and phosphonic acid catalysts on cotton bleaching process conditions","authors":"S. Yıldız, Sami Dursun","doi":"10.51435/turkjac.1296586","DOIUrl":"https://doi.org/10.51435/turkjac.1296586","url":null,"abstract":"Today's environmental and living conditions necessitate reconsideration of traditional cotton fabric bleaching processes. For this reason, it is very important for the environment and the economy to obtain higher whiteness values by using less water and chemicals in bleaching. Sodium chlorite (NaClO2), the source of chlorine dioxide (ClO2) as the most important disinfectant, which gained popularity and availability during the COVID-19 pandemic, is an appropriate oxidant for the purpose. Using NaClO2 as bleaching agent has significant advantages, such as reducing the amount of washing proses and increasing of cotton strength. Another advantage of this reagent is that it causes less fabric weight loss than other reagents. Therefore, the present work was intended to improve the process conditions (different temperatures, concentrations, and times) of bleaching of cotton fabric by using NaClO2. Optimum temperature and time were determined as 30 min at 65 °C and 30 min at 85 °C, and a high whiteness index (W.I.=88) was obtained by using phosphonic acid (HEDP). Moreover, the tensile strength, weight loss and morphologies of the samples were examined. It has been observed that sodium chlorite causes little damage to cotton fibers and requires less water for rinsing since it does not form alkaline residues.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127756073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.51435/turkjac.1302873
İpek Ömeroğlu, Vildan Sanko
Iron and copper ions detection are very important for environmental and biological processes. In this work, novel pyrene-functionalized Schiff base chitosan (Chit-Pyr) was synthesized, and this hybrid material was used as a “turn-off” fluorescence sensor for the detection of Fe2+, Fe3+, and Cu2+ ions. FTIR, UV-Vis, TGA, and SEM were used to examine for structural, thermal, and morphological properties of Chit-Pyr. This sensor exhibited a selectivity towards Fe2+, Fe3+, and Cu2+ ions among several common metal cations in the DMF dispersion. The results obtained that the proposed “turn off” fluorescence sensing mechanism of Chit-Pyr was simple and sensitive for the determination of Fe2+, Fe3+, and Cu2+ ions.
{"title":"A “Turn off” fluorescence sensor for Fe2+, Fe3+, and Cu2+ ions based on novel pyrene-functionalized chitosan","authors":"İpek Ömeroğlu, Vildan Sanko","doi":"10.51435/turkjac.1302873","DOIUrl":"https://doi.org/10.51435/turkjac.1302873","url":null,"abstract":"Iron and copper ions detection are very important for environmental and biological processes. In this work, novel pyrene-functionalized Schiff base chitosan (Chit-Pyr) was synthesized, and this hybrid material was used as a “turn-off” fluorescence sensor for the detection of Fe2+, Fe3+, and Cu2+ ions. FTIR, UV-Vis, TGA, and SEM were used to examine for structural, thermal, and morphological properties of Chit-Pyr. This sensor exhibited a selectivity towards Fe2+, Fe3+, and Cu2+ ions among several common metal cations in the DMF dispersion. The results obtained that the proposed “turn off” fluorescence sensing mechanism of Chit-Pyr was simple and sensitive for the determination of Fe2+, Fe3+, and Cu2+ ions.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127118358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.51435/turkjac.1294052
Kübra Öztürk, Çiğdem ER ÇALIŞKAN, Zehra Akinci, Harun Çiftçi
Accurately determining the composition of essential and toxic elements in commercial infant formulas is critical to ensuring safe nutrition for infants. In this study, the concentrations of essential and toxic elements (Pb, Ni, Cd, Al, Cr, Cu, Fe, Mn, Zn, Co) in infant formulas were determined using high-resolution continuum-source flame atomic absorption spectrometry (HR-CS FAAS) and have been evaluated for health risk. The measured values for concentrations from lowest to highest were (in mg/kg): 36.38–77.45 (Zn), 6.28–12.88 (Al), 2.37–4.91 (Cu), 22.01–51.64 (Fe), and 0.55–2.06 (Mn). The highest concentrations of Ni and Cd were 0.18 and 0.09 mg/kg, respectively, while the lowest concentrations for these metals were below the detection limit. The Cr, Co and Pb levels were below the detection limits in all samples. According to the risk assessment conducted for infants aged 0–24 months, which involved calculating the estimated daily intake (EDI), the estimated weekly intake (EWI), the target hazard quotient (THQ), and the hazard index (HI), it was found that the THQ values range from 0.00 to 0.06 for Ni, from 0.00 to 0.69 for Cd, and from 0.17 to 0.22 for Al. However, since the HI for all age groups is less than 1, it can be concluded that there is no health concern for the elements Ni, Cr, Cd, Pb, Al, and Co.
{"title":"Assessment of some element content and potential health risks in infant formulas available in Turkish markets","authors":"Kübra Öztürk, Çiğdem ER ÇALIŞKAN, Zehra Akinci, Harun Çiftçi","doi":"10.51435/turkjac.1294052","DOIUrl":"https://doi.org/10.51435/turkjac.1294052","url":null,"abstract":"Accurately determining the composition of essential and toxic elements in commercial infant formulas is critical to ensuring safe nutrition for infants. In this study, the concentrations of essential and toxic elements (Pb, Ni, Cd, Al, Cr, Cu, Fe, Mn, Zn, Co) in infant formulas were determined using high-resolution continuum-source flame atomic absorption spectrometry (HR-CS FAAS) and have been evaluated for health risk. The measured values for concentrations from lowest to highest were (in mg/kg): 36.38–77.45 (Zn), 6.28–12.88 (Al), 2.37–4.91 (Cu), 22.01–51.64 (Fe), and 0.55–2.06 (Mn). The highest concentrations of Ni and Cd were 0.18 and 0.09 mg/kg, respectively, while the lowest concentrations for these metals were below the detection limit. The Cr, Co and Pb levels were below the detection limits in all samples. According to the risk assessment conducted for infants aged 0–24 months, which involved calculating the estimated daily intake (EDI), the estimated weekly intake (EWI), the target hazard quotient (THQ), and the hazard index (HI), it was found that the THQ values range from 0.00 to 0.06 for Ni, from 0.00 to 0.69 for Cd, and from 0.17 to 0.22 for Al. However, since the HI for all age groups is less than 1, it can be concluded that there is no health concern for the elements Ni, Cr, Cd, Pb, Al, and Co.","PeriodicalId":274781,"journal":{"name":"Turkish Journal of Analytical Chemistry","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114704921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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