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Kublay İZ, Koçoğlu ES, Oflu S, Arvas B, Yolaçan Ç, Bakırdere S. Trace nickel determination in seawater matrix using combination of dispersive liquid-liquid microextraction and triethylamine-assisted Mg(OH) 2 method. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:861. [PMID: 37335378 DOI: 10.1007/s10661-023-11435-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/29/2023] [Indexed: 06/21/2023]
Abstract
In order to eliminate the effects of seawater matrix on the precise/accurate determination of elements, new and efficient analytical procedure requires. In this study, co-precipitation method based on the triethylamine (TEA)-assisted Mg(OH)2 was performed to eliminate side-effects of seawater medium on the determination with flame atomic absorption spectrometry (FAAS) prior to the preconcentration of nickel by an optimized dispersive liquid-liquid microextraction (DLLME) method. Under the optimum conditions of the presented method, the limit of detection and quantification (LOD, LOQ) values obtained for nickel were found as 16.1 and 53.8 μg kg-1, respectively. Seawater samples collected from West Antarctic region were used for real sample applications to check the accuracy and applicability of developed method, and satisfying recovery results (86-97%) were obtained. In addition to this, the digital image-based colorimetric detection system and the UV-Vis system were applied to confirm the applicability of the developed DLLME-FAAS method in other analytical systems.
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Affiliation(s)
- İrem Zehra Kublay
- Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye
| | - Elif Seda Koçoğlu
- Central Research Laboratory, Yıldız Technical University, 34220, Istanbul, Türkiye
| | - Sude Oflu
- Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye
| | - Büşra Arvas
- Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye
| | - Çiğdem Yolaçan
- Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye
| | - Sezgin Bakırdere
- Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye.
- Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, Çankaya, 06670, Ankara, Türkiye.
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Nun N, Hinrichs S, Schroer MA, Sheyfer D, Grübel G, Fischer B. Tuning the Size of Thermoresponsive Poly(N-Isopropyl Acrylamide) Grafted Silica Microgels. Gels 2017; 3:E34. [PMID: 30920530 PMCID: PMC6318582 DOI: 10.3390/gels3030034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/04/2017] [Accepted: 09/13/2017] [Indexed: 11/16/2022] Open
Abstract
Core-shell microgels were synthesized via a free radical emulsion polymerization of thermoresponsive poly-(N-isopropyl acrylamide), pNipam, on the surface of silica nanoparticles. Pure pNipam microgels have a lower critical solution temperature (LCST) of about 32 °C. The LCST varies slightly with the crosslinker density used to stabilize the gel network. Including a silica core enhances the mechanical robustness. Here we show that by varying the concentration gradient of the crosslinker, the thermoresponsive behaviour of the core-shell microgels can be tuned. Three different temperature scenarios have been detected. First, the usual behaviour with a decrease in microgel size with increasing temperature exhibiting an LCST; second, an increase in microgel size with increasing temperature that resembles an upper critical solution temperature (UCST), and; third, a decrease with a subsequent increase of size reminiscent of the presence of both an LCST, and a UCST. However, since the chemical structure has not been changed, the LCST should only change slightly. Therefore we demonstrate how to tune the particle size independently of the LCST.
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Affiliation(s)
- Nils Nun
- Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany.
| | - Stephan Hinrichs
- Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany.
| | - Martin A Schroer
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Dina Sheyfer
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Gerhard Grübel
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.
- The Hamburg Centre for Ultrafast Imaging (CUI), Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Birgit Fischer
- Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany.
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Zou H, Lv PF, Wang X, Wu D, Yu DG. Electrospun poly(2-aminothiazole)/cellulose acetate fiber membrane for removing Hg(II) from water. J Appl Polym Sci 2017. [DOI: 10.1002/app.44879] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hua Zou
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; 516 Jungong Road Shanghai 200093 China
| | - Peng-Fei Lv
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; 516 Jungong Road Shanghai 200093 China
| | - Xia Wang
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; 516 Jungong Road Shanghai 200093 China
| | - Di Wu
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; 516 Jungong Road Shanghai 200093 China
| | - Deng-Guang Yu
- School of Materials Science and Engineering; University of Shanghai for Science and Technology; 516 Jungong Road Shanghai 200093 China
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Özbek N, Alp H, Çelik G, Ak T, Çağılcı OC, Yaylı N, Ocak Ü, Ocak M. A Simple Spectrofluorimetric Method for Iron Determination with a Chalcone-Based Schiff Base. J Fluoresc 2016; 27:635-641. [PMID: 27914031 DOI: 10.1007/s10895-016-1992-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/25/2016] [Indexed: 11/24/2022]
Abstract
A chalcone-based Schiff base (5), capable of detecting iron (III) in partially aqueous media, has been designed, then synthesized by the condensation of 3-formyl-2-hydroxyquinoline and acetophenone. To determine iron (III) ion, a simple spectrofluorimetric method was developed by using the synthesized Schiff base. The developed method was validated by analyzing the certified reference material (CRM-SA-C Sandy Soil C). During the process of the determination of iron in food samples, satisfactory accuracy was obtained for spinach and rocket. Nitric acid and hydrogen fluoride were used for the digestion of the certified reference material whereas only nitric acid was used for food samples, in a closed microwave system. Measurements were carried out by using the modified standard addition method. The standard addition graph was linear until 5.0 mg/L. in determination of iron (III). Detection and quantification limits were 0.06 and 0.20 mg/L., respectively. The presented method is simple, time-saving, cost-effective and suitable for determination of iron content of soil and foods.
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Affiliation(s)
- Nurhayat Özbek
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Hakan Alp
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Gonca Çelik
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Tuğba Ak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Osman Can Çağılcı
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Nurettin Yaylı
- Faculty of Pharmaceutical Sciences, Pharmaceutical Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
| | - Ümmühan Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey.
| | - Miraç Ocak
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080, Trabzon, Turkey
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Zou H, Wang L, Wang X, Lv P, Liao Y. Chemical Oxidative Polymerization of 2-Aminothiazole in Aqueous Solution: Synthesis, Characterization and Kinetics Study. Polymers (Basel) 2016; 8:polym8110407. [PMID: 30974685 PMCID: PMC6432296 DOI: 10.3390/polym8110407] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/15/2016] [Accepted: 11/16/2016] [Indexed: 11/16/2022] Open
Abstract
The chemical oxidative polymerization of 2-aminothiazole (AT) was studied in aqueous solution using copper chloride (CuCl2) as an oxidant. The effect of varying the reaction temperature, reaction time and oxidant/monomer molar ratio on the polymer yield was investigated. The resulting poly(2-aminothiazole)s (PATs) were characterized by FTIR, 1H NMR, UV-vis, gel permeation chromatography, scanning electron microscopy, thermogravimetric analysis and four-point probe electrical conductivity measurements. Compared with a previous study, PATs with higher yield (81%) and better thermal stability could be synthesized. The chemical oxidative polymerization kinetics of AT were studied for the first time. The orders of the polymerization reaction with respect to monomer concentration and oxidant concentration were found to be 1.14 and 0.97, respectively, and the apparent activation energy of the polymerization reaction was determined to be 21.57 kJ/mol.
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Affiliation(s)
- Hua Zou
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Lu Wang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Xia Wang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Pengfei Lv
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Yaozu Liao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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Wang X, Lv P, Zou H, Li Y, Li X, Liao Y. Synthesis of Poly(2-aminothiazole) for Selective Removal of Hg(II) in Aqueous Solutions. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04630] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xia Wang
- School
of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Pengfei Lv
- School
of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Hua Zou
- School
of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Ying Li
- School
of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Xiaoyan Li
- School
of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
| | - Yaozu Liao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
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8
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Nomngongo PN, Ngila JC. Functionalized nanometer-sized alumina supported micro-solid phase extraction coupled to inductively coupled plasma mass spectrometry for preconcentration and determination of trace metal ions in gasoline samples. RSC Adv 2014. [DOI: 10.1039/c4ra07074g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Nomngongo PN, Catherine Ngila J, Kamau JN, Msagati TA, Marjanovic L, Moodley B. Pre-concentration of trace elements in short chain alcohols using different commercial cation exchange resins prior to inductively coupled plasma-optical emission spectrometric detection. Anal Chim Acta 2013; 787:78-86. [DOI: 10.1016/j.aca.2013.05.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 05/15/2013] [Accepted: 05/23/2013] [Indexed: 11/28/2022]
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Preconcentration of molybdenum, antimony and vanadium in gasolsine samples using Dowex 1-x8 resin and their determination with inductively coupled plasma–optical emission spectrometry. Talanta 2013; 110:153-9. [DOI: 10.1016/j.talanta.2013.02.032] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 02/12/2013] [Accepted: 02/13/2013] [Indexed: 11/17/2022]
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Ciftci H, Er C. Solid-phase extraction and separation procedure for trace aluminum in water samples and its determination by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). ENVIRONMENTAL MONITORING AND ASSESSMENT 2013; 185:2745-2753. [PMID: 22740156 DOI: 10.1007/s10661-012-2745-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 06/14/2012] [Indexed: 06/01/2023]
Abstract
In the present study, a separation/preconcentration procedure for determination of aluminum in water samples has been developed by using a new atomic absorption spectrometer concept with a high-intensity xenon short-arc lamp as continuum radiation source, a high-resolution double-echelle monochromator, and a charge-coupled device array detector. Sample solution pH, sample volume, flow rate of sample solution, volume, and concentration of eluent for solid-phase extraction of Al chelates with 4-[(dicyanomethyl)diazenyl] benzoic acid on polymeric resin (Duolite XAD-761) have been investigated. The adsorbed aluminum on resin was eluted with 5 mL of 2 mol L(-1) HNO(3) and its concentration was determined by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). Under the optimal conditions, limit of detection obtained with HR-CS FAAS and Line Source FAAS (LS-FAAS) were 0.49 μg L(-1) and 3.91 μg L(-1), respectively. The accuracy of the procedure was confirmed by analyzing certified materials (NIST SRM 1643e, Trace elements in water) and spiked real samples. The developed procedure was successfully applied to water samples.
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Affiliation(s)
- Harun Ciftci
- Department of Chemistry, Faculty of Science and Arts, Ahi Evran University, Kirsehir, Turkey.
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13
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de Castro GR, de Oliveira JD, Alcântara IL, Roldan PS, Padilha CCF, Prado AGS, Padilha PM. Application of Cellulose Modified with p‐Aminobenzoic Groups in Preconcentration System for Determination of Cu, Fe, Ni, and Zn in Fuel Ethanol Samples by Flame Atomic Absorption Spectrometry. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390701242061] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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