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Cooray AT, Pullin MJ. Ferrozine colorimetry and reverse flow injection analysis (rFIA) based method for the determination of total iron in aqueous solutions at nanomolar concentrations. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Tanaka H, Kurokawa Y, Takeuchi M, Ohbuchi A. Amplitude modulated flow analysis for speciation—Proof of concept by quantification of Fe2+ and Fe3+ ions. TALANTA OPEN 2021. [DOI: 10.1016/j.talo.2021.100031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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3
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Okabe S, Oda K, Muto M, Sahoo YV, Tanaka M. Speciation and determination of iron in aqueous solution and river water by high-resolution electrospray ionization mass spectrometry. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Burgay F, Barbaro E, Cappelletti D, Turetta C, Gallet JC, Isaksson E, Stenni B, Dreossi G, Scoto F, Barbante C, Spolaor A. First discrete iron(II) records from Dome C (Antarctica) and the Holtedahlfonna glacier (Svalbard). CHEMOSPHERE 2021; 267:129335. [PMID: 33352366 DOI: 10.1016/j.chemosphere.2020.129335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
Fe(II) is more soluble and bioavailable than Fe(III) species, therefore the investigation of their relative abundance and redox processes is relevant to better assess the supply of bioavailable iron to the ocean and its impact on marine productivity. In this context, we present a discrete chemiluminescence-based method for the determination of Fe(II) in firn matrices. The method was applied on discrete samples from a snow pit collected at Dome C (DC, Antarctica) and on a shallow firn core from the Holtedahlfonna glacier (HDF, Svalbard), providing the first Fe(II) record from both Antarctica and Svalbard. The method showed low detection limits (0.006 ng g-1 for DC and 0.003 ng g-1 for the HDF) and a precision ranging from 3% to 20% RSD. Fe(II) concentrations ranged between the LoD and 0.077 ng g-1 and between the LoD and 0.300 ng g-1 for the Antarctic and Arctic samples, respectively. The Fe(II) contribution with respect to the total dissolved Fe was comparable in both sites accounting, on average, for 5% and 3%, respectively. We found that Fe(II) correctly identified the Pinatubo/Cerro Hudson eruption in the DC record, demonstrating its reliability as volcanic tracer, while, on the HDF core, we provided the first preliminary insight on the processes that might influence Fe speciation in firn matrices (i.e. organic ligands and pH influences).
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Affiliation(s)
- François Burgay
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy.
| | - Elena Barbaro
- Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy
| | - David Cappelletti
- Università degli Studi di Perugia, Dipartimento di Chimica, Biologia e Biotecnologie, Via Elce di Sotto 8, Perugia, Italy
| | - Clara Turetta
- Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy
| | | | | | - Barbara Stenni
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy
| | - Giuliano Dreossi
- Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy
| | - Federico Scoto
- Institute of Atmospheric Sciences and Climate, National Research Council, Lecce, Italy
| | - Carlo Barbante
- Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy; Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy
| | - Andrea Spolaor
- Institute of Polar Sciences, National Research Council, Campus Scientifico, Via Torino, 155, Venice, Italy; Ca' Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, Via Torino, 155, Venice, Italy
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5
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Novel approach to determination of Fe(II) using a flow system with direct-injection detector. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02649-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
This paper presents a novel, automatic, simple approach to stop-flow photometric determination of Fe(II) in wastewater and wine samples using a multi-pumping flow system with a direct-injection detector. The basis for the determination was the reaction of Fe(II) with 1,10-phenanthroline, which was carried out in the reaction chamber of the direct-injection detector. The research included a selection of appropriate parameters of the proposed analytical procedure and method validation. Under optimized conditions, linear calibration curves were obtained in two concentration ranges of Fe(II) 0.07–1.00 and 1.00–7.00 mg/dm3, with the quantification limit of 0.07 mg/dm3. The procedure was validated by studying the accuracy (8.2%, RE) and precision (9.6 and 14.8%, RSD, for higher and lower concentration range, respectively). The proposed method was successfully employed in Fe(II) determination in spiked wastewater and wine samples with recovery of 95.8–104.5%. Using the procedure, time of a single analysis (for three independently measured signals) was about 300 s and sample and reagent consumptions were 240 and 60 mm3, respectively.
Graphic abstract
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6
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On-line spectrophotometric determination of ferrous and total iron in monominerals by flow injection combined with a Schlenk line-based digestion apparatus to exclude oxygen. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Novel Approach to Automated Flow Titration for the Determination of Fe(III). Molecules 2020; 25:molecules25071533. [PMID: 32230920 PMCID: PMC7180818 DOI: 10.3390/molecules25071533] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 11/24/2022] Open
Abstract
A novel approach to automated flow titration with spectrophotometric detection for the determination of Fe(III) is presented. The approach is based on the possibility of strict and simultaneous control of the flow rates of sample and titrant streams over time. It consists of creating different but precisely defined concentration gradients of titrant and analyte in each successively formed monosegments, and is based on using the calculated titrant dilution factor. The procedure was verified by complexometric titration of Fe(III) in the form of a complex with sulfosalicylic acid, using EDTA as a titrant. Fe(III) and Fe(II) (after oxidation to Fe(III) with the use of H2O2) were determined with good precision (CV lower than 1.7%, n = 6) and accuracy (|RE| lower than 3.3%). The approach was applied to determine Fe(III) and Fe(II) in artesian water samples. Results of determinations were consistent with values obtained using the ICP–OES reference method. Using the procedure, it was possible to perform titration in 6 min for a wide range of analyte concentrations, using 2.4 mL of both sample and titrant.
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Coldur M, Oguzlar S, Zeyrek Ongun M, Oter O, Yıldırım S. Usage of thiocyanate-based ionic liquid as new optical sensor reagent: Absorption and emission based selective determination of Fe (III) ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117385. [PMID: 31336319 DOI: 10.1016/j.saa.2019.117385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/09/2019] [Accepted: 07/13/2019] [Indexed: 06/10/2023]
Abstract
In this work, the ionic liquid 1-butyl-3-methylimidazolium thiocyanate ([BMIM][SCN]) was evaluated for the first time for its probable usage as new optical sensor reagent for the determination of several metal ions. The ionic liquid exhibited a selective and sensitive response to iron ions in acidic aqueous solutions among all of the tested metal ions. The ([BMIM][SCN]) was encapsulated in ethyl cellulose (EC) matrix in the form of continuous thin films. The effect of [BMIM][SCN] concentration and pH to iron response, the fluorescence quantum yield, the absorption, emission and excitation based characteristics of the ionic liquid in presence of Fe3+ and Fe2+ ions were investigated in both EC and [BMIM][SCN]/aqueous buffer solution mixtures. As a result, the highly sensitive, selective and rapid responding optical sensor reagent which does not need any time-consuming extraction, oxidation and reduction procedures was presented for the distinguishing determination of Fe3+ and Fe2+ in both aqueous solutions and solid thin film matrix. The ionic liquid exhibited a better emission and absorption based response for Fe3+ ions when compared with the Fe2+ ions. The molar absorptivity constant in presence of ionic liquid-based SCN- was enhanced 10 times to 1.21 × 104 L mol-1 cm-1 for Fe3+ ions in the solution phase. Linear absorption and emission-based calibration graphs were obtained for a wide concentration range of 8.0 × 10-8-6.2 × 10-4 M and 8.0 × 10-8-6.2 × 10-5 M for Fe3+, respectively. Limit of detection (LOD) values for absorption and emission-based methods were 2.48 × 10-5 and 2.4 × 10-8, respectively. The reaction is instantaneous and absorbance remains stable for over 4 months.
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Affiliation(s)
- Muge Coldur
- The Graduate School of Natural and Applied Sciences, Dokuz Eylul University, Izmir, Turkey
| | - Sibel Oguzlar
- Center for Fabrication and Application of Electronic Materials, Dokuz Eylul University, Izmir, Turkey
| | - Merve Zeyrek Ongun
- Chemistry Technology Program, Izmir Vocational High School, Dokuz Eylul University, Izmir, Turkey.
| | - Ozlem Oter
- Department of Chemistry, Faculty of Science, Dokuz Eylul University, Izmir, Turkey
| | - Serdar Yıldırım
- Center for Fabrication and Application of Electronic Materials, Dokuz Eylul University, Izmir, Turkey; Department of Metallurgical and Material Engineering, Dokuz Eylul University, Izmir, Turkey
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9
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Wei S, Tan L, Yin X, Wang R, Shan X, Chen Q, Li T, Zhang X, Jiang C, Sun G. A sensitive “ON–OFF” fluorescent probe based on carbon dots for Fe2+ detection and cell imaging. Analyst 2020; 145:2357-2366. [DOI: 10.1039/c9an02309g] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A sensitive fluorescent probe based on carbon dots has been synthesized by a one-pot hydrothermal method for the rapid detection of intracellular Fe2+.
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Affiliation(s)
- Shanshan Wei
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
- Advanced Institute of Materials Science
| | - Lihong Tan
- School of Life Sciences
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Xiangyu Yin
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Ruoming Wang
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Xueru Shan
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Qian Chen
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Tinghua Li
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
- Advanced Institute of Materials Science
| | - Xinyu Zhang
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
- Advanced Institute of Materials Science
| | - Chunzhu Jiang
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Guoying Sun
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
- Advanced Institute of Materials Science
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10
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Li Z, Ti M, Yang K, Li X, Wu L, He Y. Colorimetric detection of iron (II) using 4-mercaptobenzoic acid and 3,3′,5,5′-tetramethylbenzidine modified silver nanoparticles. Microchem J 2019. [DOI: 10.1016/j.microc.2019.104254] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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11
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Shah SNA, Dou X, Khan M, Uchiyama K, Lin JM. N-doped carbon dots/H 2O 2 chemiluminescence system for selective detection of Fe 2+ ion in environmental samples. Talanta 2018; 196:370-375. [PMID: 30683378 DOI: 10.1016/j.talanta.2018.12.091] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/30/2018] [Accepted: 12/25/2018] [Indexed: 12/24/2022]
Abstract
The nitrogen doped carbon dots (N-CDs) produces strong chemiluminescence (CL)-emission due to hydroxyl radical (•OH) induced electron-hole transition in N-CDs. The Fe2+ has the ability to generate •OH from available hydrogen peroxide (H2O2). Therefore, a pre-mixed N-CDs/H2O2 solution was utilized for selective quantification of Fe2+ in solution via CL-emission. A linear increase in the CL-emission intensity was observed within increase in Fe2+ concentration. The N-CDs/H2O2 system enabled the detection of Fe2+ up to lower concentration of 0.2 × 10-9 M with a linear dynamic range of 1.0 × 10-9-1.0 × 10-6 M. Significantly, no CL-emission was observed when other divalent cations, Al3+, Fe3+, or Cr3+ were injected to this system. Moreover, no interference was observed when a mixed solution of Fe2+ and other cations were introduced to N-CDs/H2O2. The practical evaluation of N-CDs/H2O2 system was demonstrated for detection of Fe2+ in tap, lotus pond, and canal water samples. The easy detection, high sensitivity, and selectivity make this method a significant tool for analysis of Fe2+ in solution.
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Affiliation(s)
- Syed Niaz Ali Shah
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xiangnan Dou
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China; Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Mashooq Khan
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Katsumi Uchiyama
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.
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12
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Pulicharla R, Drouinaud R, Brar SK, Drogui P, Proulx F, Verma M, Surampalli RY. Activation of persulfate by homogeneous and heterogeneous iron catalyst to degrade chlortetracycline in aqueous solution. CHEMOSPHERE 2018; 207:543-551. [PMID: 29843031 DOI: 10.1016/j.chemosphere.2018.05.134] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 04/03/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
This study investigates the removal of chlortetracycline (CTC) antibiotic using sulfate radical-based oxidation process. Sodium persulfate (PS) was used as a source to generate sulfate radicals by homogeneous (Fe2+) and heterogeneous (zero valent iron, ZVI) iron as a catalyst. Increased EDTA concentration was used to break the CTC-Fe metal complexes during CTC estimation. The influence of various parameters, such as PS concentration, iron (Fe2+ and ZVI) concentration, PS/iron molar ratio, and pH were studied and optimum conditions were reported. CTC removal was increased with increasing concentration of PS and iron at an equal molar ratio of PS/Fe2+ and PS/ZVI processes. PS/Fe2+ and PS/ZVI oxidation processes at 1:2 (500 μM PS and 1000 μM) molar ratio showed 76% and 94% of 1 μM CTC removal in 2 h. Further increased molar ratio 1:2 onwards, PS/Fe2+ process showed a slight increase in CTC degradation whereas in PS/ZVI process showed similar degradation to 1:2 (PS/Fe) ratio at constant PS 500 μM concentration. Slower activation of persulfate which indirectly indicates the slower generation of sulfate radicals in PS/ZVI process showed higher degradation efficiency of CTC. The detected transformation products and their estrogenicity results stated that sulfate radicals seem to be efficient in forming stable and non-toxic end products.
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Affiliation(s)
- Rama Pulicharla
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9
| | - Roggy Drouinaud
- Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6
| | - Satinder Kaur Brar
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9.
| | - Patrick Drogui
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9
| | - Francois Proulx
- Service du traitement des eaux, 214, Avenue St-Sacrement, Suite 210, Québec, Canada G1N 3X6
| | - Mausam Verma
- CO2 Solutions Inc., 2300, Rue Jean-Perrin, Québec, Québec G2C 1T9 Canada
| | - Rao Y Surampalli
- Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA
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13
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Paluch J, Kozak J, Wieczorek M, Kozak M, Kochana J, Widurek K, Konieczna M, Kościelniak P. Novel approach to two-component speciation analysis. Spectrophotometric flow-based determinations of Fe(II)/Fe(III) and Cr(III)/Cr(VI). Talanta 2017; 171:275-282. [PMID: 28551141 DOI: 10.1016/j.talanta.2017.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 05/02/2017] [Indexed: 10/19/2022]
Abstract
The proposed approach to two-component speciation analysis relies on simultaneous application of two calibration methods to determination of two different forms of an analyte. One form is determined in extrapolative way, whereas the second form is determined in interpolative way, with the use of the same calibration graph, after appropriate chemical treatment, e.g. oxidation or reduction. The applicability of the approach has been verified on the examples of spectrophotometric determinations of Fe(II)/Fe(III) and Cr(VI)/Cr(III) using 1,10-phenanthroline and 1,5-diphenylcarbazide methods, respectively. In the above methods, ascorbic acid and Ce(IV) have been used to reduce Fe(III) to Fe(II) and to oxidize Cr(III) to Cr(VI), respectively. Lab-In-Syringe and SIA systems (for determination of iron and chromium species, respectively) have been applied to make the implementation of the proposed approach more convenient. The approach was verified on the example of determination of the analytes in synthetic and certified reference materials of ground and waste water samples. Using the developed methods, Fe(II)/Fe(III) and Cr(VI)/Cr(III) were determined within the concentration ranges of 0.06-4.0/0.06-3.0 and 0.03-0.5/0.05-7.0mgL-1, with precision (RSD, %) less than 3.8/2.0 and 2.2/6.0, and accuracy (RE, %) better than 2.9/4.3 and 6.8/5.2, respectively. The detection limits (mgL-1) are 0.02/0.02 and 0.01/0.02 for determination of both forms of iron and chromium, respectively. The applicability of the approach has been checked by analysis of artesian water (Fe(II)/Fe(III)) and post-production waste samples (Cr(III)/Cr(VI)).
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Affiliation(s)
- J Paluch
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - J Kozak
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland.
| | - M Wieczorek
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - M Kozak
- Division of Petroleum Processing, Oil and Gas Institute - National Research Institute, Łukasiewicza 1, 31-429 Krakow, Poland
| | - J Kochana
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - K Widurek
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - M Konieczna
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - P Kościelniak
- Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
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Kozak J, Paluch J, Węgrzecka A, Kozak M, Wieczorek M, Kochana J, Kościelniak P. Single peak parameters technique for simultaneous measurements: Spectrophotometric sequential injection determination of Fe(II) and Fe(III). Talanta 2016; 148:626-32. [DOI: 10.1016/j.talanta.2015.06.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/13/2015] [Accepted: 06/17/2015] [Indexed: 11/24/2022]
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15
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Chen S, Li N, Zhang X, Yang D, Jiang H. Online spectrophotometric determination of Fe(II) and Fe(III) by flow injection combined with low pressure ion chromatography. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:375-380. [PMID: 25523043 DOI: 10.1016/j.saa.2014.11.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 10/27/2014] [Accepted: 11/23/2014] [Indexed: 06/04/2023]
Abstract
A simple and new low pressure ion chromatography combined with flow injection spectrophotometric procedure for determining Fe(II) and Fe(III) was established. It is based on the selective adsorption of low pressure ion chromatography column to Fe(II) and Fe(III), the online reduction reaction of Fe(III) and the reaction of Fe(II) in sodium acetate with phenanthroline, resulting in an intense orange complex with a suitable absorption at 515nm. Various chemical (such as the concentration of colour reagent, eluant and reductive agent) and instrumental parameters (reaction coil length, reductive coil length and wavelength) were studied and were optimized. Under the optimum conditions calibration graph of Fe(II)/Fe(III) was linear in the Fe(II)/Fe(III) range of 0.040-1.0mg/L. The detection limit of Fe(III) and Fe(II) was respectively 3.09 and 1.55μg/L, the relative standard deviation (n=10) of Fe(II) and Fe(III) 1.89% and 1.90% for 0.5mg/L of Fe(II) and Fe(III) respectively. About 2.5 samples in 1h can be analyzed. The interfering effects of various chemical species were studied. The method was successfully applied in the determination of water samples.
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Affiliation(s)
- Shujuan Chen
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan, PR China; College of Food Science, Sichuan Agricultural University, Yaan 625014, Sichuan, PR China
| | - Nan Li
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Xinshen Zhang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan, PR China; State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University, Sichuan University, Chengdu 610065, Sichuan, PR China.
| | - Dongjing Yang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Heimei Jiang
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, Sichuan, PR China
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Simultaneous spectrophotometric flow injection determination of phosphate and silicate. Talanta 2014; 133:150-4. [PMID: 25435241 DOI: 10.1016/j.talanta.2014.07.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 06/21/2014] [Accepted: 07/21/2014] [Indexed: 11/23/2022]
Abstract
A method for the simultaneous determination of phosphate and silicate based on spectrophotometric measurement at 385 nm of a single peak using a flow injection system with two component calibration is described. In the system, a stream of sample containing both analytes is merged with a stream of ammonium molybdate to form (at 1<pH<2) molybdophosphoric and molybdosilicic acids. Total absorbance of the compounds is registered in a form of a constant signal. Simultaneously, oxalic acid solution is injected into a carrier stream (H2SO4) and then merged with the stream of sample containing the mixture of heteropolyacids. A characteristic peak is registered as a result of selective decomposition of molybdophosphoric acid by oxalic acid. The area (or the absorbance measured at the constant signal) and the absorbance measured at the minimum of the peak can be used as measures corresponding to the phosphate and silicate concentrations, respectively. The time of the peak registration is about 3 min. Two-component calibration with the use of four standard solutions of the phosphate/silicate concentrations established in accordance with 2(2) factorial design was applied. Phosphate and silicate can be determined within the concentration ranges of 0.20-15.00 and 0.20-20.00 mg L(-1), with precision less than 2.7 and 0.9% (RSD), respectively and accuracy better than 6.2% (RE). The detection limit is 0.054 and 0.092 mg L(-1) for phosphate and silicate, respectively. The method was applied to determination of the analytes in certified reference materials of groundwater, wastewater, and river water giving results consistent with the certified values.
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Ozay O, Ozay H. Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.882691] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Spolaor A, Vallelonga P, Gabrieli J, Roman M, Barbante C. Continuous flow analysis method for determination of soluble iron and aluminium in ice cores. Anal Bioanal Chem 2012; 405:767-74. [DOI: 10.1007/s00216-012-6166-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 05/29/2012] [Accepted: 05/29/2012] [Indexed: 10/28/2022]
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19
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Jing L, Liang C, Shi X, Ye S, Xian Y. Fluorescent probe for Fe(iii) based on pyrene grafted multiwalled carbon nanotubes by click reaction. Analyst 2012; 137:1718-22. [DOI: 10.1039/c2an16152d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Kozak J, Jodłowska N, Kozak M, Kościelniak P. Simple flow injection method for simultaneous spectrophotometric determination of Fe(II) and Fe(III). Anal Chim Acta 2011; 702:213-7. [DOI: 10.1016/j.aca.2011.06.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 06/18/2011] [Accepted: 06/28/2011] [Indexed: 10/18/2022]
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