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Watanabe K, Watanabe T, Kimura S, Ikezaki H, Toko K. Electrical Properties of Taste Sensors with Positively Charged Lipid Membranes Composed of Amines and Ammonium Salts. SENSORS (BASEL, SWITZERLAND) 2023; 23:8145. [PMID: 37836980 PMCID: PMC10574834 DOI: 10.3390/s23198145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 10/15/2023]
Abstract
Currently, taste sensors utilizing lipid polymer membranes are utilized to assess the taste of food products quantitatively. During this process, it is crucial to identify and quantify basic tastes, e.g., sourness and sweetness, while ensuring that there is no response to tasteless substances. For instance, suppression of responses to anions, like tasteless NO3- ions contained in vegetables, is essential. However, systematic electrochemical investigations have not been made to achieve this goal. In this study, we fabricated three positively charged lipid polymer membranes containing oleylamine (OAm), trioctylemethylammonium chloride (TOMACl), or tetradodecylammonium bromide (TDAB) as lipids, and sensors that consist of these membranes to investigate the potential change characteristics of these sensors in solutions containing different anions (F-, Cl-, Br-, NO3-, I-). The ability of each anion solution to reduce the positive charge on membranes and shift the membrane potential in the negative direction was in the following order: I- > NO3- > Br- > Cl- > F-. This order well reflected the order of size of the hydrated ions, related to their hydration energy. Additionally, the OAm sensor displayed low ion selectivity, whereas the TOMACl and TDAB sensors showed high ion selectivity related to the OAm sensor. Such features in ion selectivity are suggested to be due to the variation in positive charge with the pH of the environment and packing density of the OAm molecule in the case of the OAm sensor and due to the strong and constant positive charge created by complete ionization of lipids in the case of TOMACl and TDAB sensors. Furthermore, it was revealed that the ion selectivity varies by changing the lipid concentration in each membrane. These results contribute to developing sensor membranes that respond to different anion species selectively and creating taste sensors capable of suppressing responses to tasteless anions.
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Affiliation(s)
- Kentaro Watanabe
- Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tatsukichi Watanabe
- Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shunsuke Kimura
- Research and Development Center for Five-Sense Devices, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hidekazu Ikezaki
- Intelligent Sensor Technology, Inc., 5-1-1 Onna, Atsugi-shi 243-0032, Japan;
| | - Kiyoshi Toko
- Research and Development Center for Five-Sense Devices, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Advanced Study, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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2
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Pokhvishcheva NV, Prozherin IS, Kalinichev AV, Peshkova MA. Response Patterns of Chromoionophore-Based Bulk Optodes Containing Lipophilic Electrolytes: Toward Background-Independent pH-Sensing. ACS Sens 2023; 8:3086-3094. [PMID: 37524060 DOI: 10.1021/acssensors.3c00742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Despite a number of advantages of ion-selective optical sensors (optodes), their practical application is limited by their response mechanism, which leads to the dependence of the signal on the activity of two ions (analyte ion and the so-called reference ion) in the solution at the same time. Here, we show that the introduction of a lipophilic electrolyte into the polymeric optode membrane allows assessing the ionic activity of H+ cations regardless of the concentration of the background electrolyte containing a hydrophilic cation, with NaCl as an example of such an electrolyte. For the first time, the applicability of this approach is proven theoretically utilizing the numerical simulation of optode response. A correlation between the interfacial potential stability and the single-ion optical response is established. The predicted optical response is independent of background cation concentration to a significant extent. Theoretical conclusions are supported by experimental data obtained with chromoionophore-based optodes doped with various lipophilic electrolytes, including ionic liquids, by thin-film spectrophotometry and macrophotography coupled with digital color analysis. Most of the experimental sensor characteristics, such as the response range and its median, as well as its independence from the background electrolyte concentration are in quantitative agreement with the proposed theoretical description.
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Affiliation(s)
- Nadezhda V Pokhvishcheva
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Ilya S Prozherin
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Andrey V Kalinichev
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
| | - Maria A Peshkova
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia
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3
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Kishioka A, Matsushita Y, Miyake M. Detection of Interfering Ions Using Ion Flux Phenomena in Flow-Through Cl-ISEs with Ion Exchange Membranes. Anal Chem 2023; 95:7584-7593. [PMID: 37140250 DOI: 10.1021/acs.analchem.3c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Ion-selective electrodes (ISEs) are among the most successful electrochemical sensors used in various applications because of their ability to measure electrolyte concentrations in liquids easily. It is common practice to suppress ion fluxes through the ion-sensitive membranes in ISEs because such fluxes worsen the lower limit of detection. In this study, we propose a method to detect interfering ions using this ion flux phenomenon. As a proof of principle, a flow-type Cl-ISE based on an ion exchange membrane loaded with the target ion chloride was used to acquire transient potential profiles during standstill after the introduction of liquids containing various ion species. When the target ion of the ion-sensitive membrane was measured, there was almost no change in potential over time. In contrast, when hydrophilic interfering ions were measured, the potential gradually decreased, and when hydrophobic interfering ions were measured, the potential gradually increased. The direction and intensity of these changes over time depended on the ion species and concentrations. The main reason for these potential changes is presumed to be the change in the local ionic composition of the sample near the sensing membrane due to ion exchange between the sample and membrane. This phenomenon could not be observed in a hydrophobic ion exchanger membrane doped with a quaternary ammonium salt and was characteristically observable using hydrophilic ion exchange membranes with a high charge density and a high ion diffusion rate. Finally, using a high-throughput flow-type system, we demonstrated the detection of interfering ions in solutions containing multiple ion species by using the ion flux phenomenon.
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Affiliation(s)
- Atsushi Kishioka
- Biosystems Research Department, Research & Development Group, Hitachi, Ltd., 1-280, Higashi-koigakubo, Kokubunji-shi, Tokyo 185-8601, Japan
| | - Yufuku Matsushita
- Biosystems Research Department, Research & Development Group, Hitachi, Ltd., 1-280, Higashi-koigakubo, Kokubunji-shi, Tokyo 185-8601, Japan
| | - Masafumi Miyake
- Medical Systems Design 1st dept., Life & Medical systems Product Div., Analytical & Medical Solution Business Group, Hitachi High-Tech Corporation, 882, Ichige, Hitachinaka-shi, Ibaraki, 312-8504, Japan
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4
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Faisal A. Salih, Novakovskii AD, Egorov VV. Verapamil-Sensitive Electrodes: Main Factors Responsible for Analytical Performance and Use in Drug Analysis. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822120127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Wang D, Xia T, Wang Y, Chen Y, Zhang C, Murray W, Schultz AT, Liu Z, Yang J. Citrate-based fluorometric sensor for multi-halide sensing. SMART MATERIALS IN MEDICINE 2022; 3:374-381. [PMID: 38031570 PMCID: PMC10686323 DOI: 10.1016/j.smaim.2022.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Halides play important roles in human health and environmental monitoring. However, different halides interfere with each other in current measurement methods. Simultaneous sensing of multiple halides in a fast and low-cost manner remains a challenge. Here, we report a fluorometric multi-halide sensing method by using a single citrate-based fluorophore, CA-Cys, on a custom-made portable device. The fluorescence emitted by CA-Cys is quenched due to the dynamic quenching of halide ions; the sensitivities vary from halide types and pH, providing the capability to obtain multiple Stern-Volmer equations at various pH values. The concentration of each halide can then be obtained by solving the resultant set of equations. A mM scale detection limit is demonstrated, which is suitable for halide wastewater monitoring. A proof-of-concept smartphone-based portable device is also fabricated and tested. The results from the fluorometer and portable device indicated that our multi-halide system is promising for real-world multi-halide sensing applications. This work represents a new direction in developing portable, low-cost, and simultaneous multi-halide sensing technologies.
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Affiliation(s)
- Dingbowen Wang
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Tunan Xia
- Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yuqi Wang
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yizhu Chen
- Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Chenji Zhang
- Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - William Murray
- Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Adam Thomas Schultz
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Zhiwen Liu
- Department of Electrical Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Jian Yang
- Department of Biomedical Engineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
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Liu Y, Fan J, Zhang N, Xu H, Su W, Qin Y, Jiang D. Trihexyltetradecylphosphonium chloride based ratiometric fluorescent nanosensors for multiplex anion discrimination. Analyst 2022; 147:3209-3218. [DOI: 10.1039/d2an00735e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multiplex anion-responsive platform was developed with [THTP][Cl] and ETH5350, providing colorimetric and spectroscopic transformations. By choosing suitable ionophores, a pool of nanosensors for extended anions could be achieved.
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Affiliation(s)
- Yueling Liu
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, P.R. China
- Department of Applied Biology, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Jianhua Fan
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, P.R. China
- Department of Applied Biology, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Ni Zhang
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, P.R. China
| | - Huiying Xu
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, P.R. China
| | - Wei Su
- State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai, 200237, P.R. China
| | - Yu Qin
- State Key Laboratory of Analytical Chemistry for Life science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P.R. China
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P.R. China
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7
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Xiang Z, Jing Y, Ikezaki H, Toko K. Electrical Properties of Two Types of Membrane Component Used in Taste Sensors. SENSORS 2021; 21:s21248343. [PMID: 34960437 PMCID: PMC8708939 DOI: 10.3390/s21248343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 11/25/2022]
Abstract
The lipid phosphoric acid di-n-decyl ester (PADE) has played an important role in the development of taste sensors. As previously reported, however, the concentration of PADE and pH of the solution affected the dissociation of H+, which made the measurement results less accurate and stable. In addition, PADE caused deterioration in the response to bitterness because PADE created the acidic environment in the membrane. To solve these problems, our past study tried to replace the PADE with a completely dissociated substance called tetrakis [3,5-bis (trifluoromethyl) phenyl] borate sodium salt dehydrate (TFPB) as lipid. To find out whether the two substances can be effectively replaced, it is necessary to perform an in-depth study on the properties of the two membranes themselves. In this study, we fabricated two types of membrane electrodes, based on PADE or TFPB, respectively, using 2-nitrophenyl octyl ether (NPOE) as a plasticizer. We measured the selectivity to cations such as Cs+, K+, Na+ and Li+, and also the membrane impedance of the membranes comprising PADE or TFPB of the different concentrations. As a result, we found that any concentration of PADE membranes always had low ion selectivity, while the ion selectivity of TFPB membranes was concentration-dependent, showing increasing ion selectivity with the TFPB concentrations. The ion selectivity order was Cs+>K+>Na+>Li+. The hydration of ions was considered to participate in this phenomenon. In addition, the membrane impedance decreased with increasing PADE and TFPB concentrations, while the magnitudes differed, implying that there is a difference in the dissociation of the two substances. The obtained results will contribute to the development of novel receptive membranes of taste sensors.
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Affiliation(s)
- Zhanyi Xiang
- Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;
- Correspondence: ; Tel.: +81-92-802-3762
| | - Yifei Jing
- Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;
| | - Hidekazu Ikezaki
- Intelligent Sensor Technology, Inc., 5-1-1 Onna, Atsugi-shi 243-0032, Japan;
| | - Kiyoshi Toko
- Institute for Advanced Study, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;
- Research and Development Center for Five-Sense Devices, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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8
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Yang W, Zhai J, Li J, Qin Y, Wu Y, Zhang Y, Xie X. Colorimetric and fluorescent turn-on detection of chloride ions with ionophore and BODIPY: Evaluation with nanospheres and cellulose paper. Anal Chim Acta 2021; 1175:338752. [PMID: 34330436 DOI: 10.1016/j.aca.2021.338752] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 05/14/2021] [Accepted: 06/10/2021] [Indexed: 11/26/2022]
Abstract
Here, we present the optical detection of chloride ions with co-extraction based anion-selective optodes containing a BODIPY derivative (BDP-OH) and the ionophore In(OEP)Cl. Spectroscopic studies suggested that BDP-OH and In(OEP)Cl formed an adduct BDP-O-In(OEP), which was converted to BDP-OH and In(OEP)Cl upon increasing sample Cl- concentration, and induced signal changes in both fluorescence and absorbance modes. The method was evaluated in polystyrene-graft-poly(ethylene oxide) (PS-PEO) nanospheres (ca. 40 nm in diameter) and on cellulose paper. In contrast to Cl- probes based on fluorescence quenching, the nanospheres exhibited turn-on fluorescence and ratiometric absorbance responses to a tunable Cl- concentration range (10 μM-1 M). Through fluorescence microscopy, the nanospheres were able to respond to Cl- concentration changes in HeLa cells. Cellulose paper-based Cl- optodes with colorimetric response were successfully used to measure Cl- in artificial sweat, providing a potential analytical tool for clinical diagnosis of cystic fibrosis.
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Affiliation(s)
- Wei Yang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jingying Zhai
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jing Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yu Qin
- Nanjing Eaglenos Co. Ltd., Nanjing, 211800, China
| | - Yaotian Wu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yupu Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiaojiang Xie
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
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Kalinichev AV, Pokhvishcheva NV, Peshkova MA. Influence of Electrolyte Coextraction on the Response of Indicator-Based Cation-Selective Optodes. ACS Sens 2020; 5:3558-3567. [PMID: 33074653 DOI: 10.1021/acssensors.0c01747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, we report on systematic investigation of the impact of coextraction of the aqueous electrolyte and anion interference on the response of cation-selective bulk optodes. It is evident that to deliberately manage the properties of chemical sensors and to apply them in routine analysis, one should have exhaustive insight into their operation mechanism. Despite the extensive research in the field of ionophore-based optodes and numerous attempts for their practical application, the understanding of how coextraction of an aqueous electrolyte influences its response characteristics has not been developed thus far. Meanwhile, the electrolyte coextraction determines the detection limits of analogous ion-selective electrodes. A theoretical model based on phase distribution equilibrium is proposed to quantitatively describe the effect of Donnan exclusion failure on the response of polymeric plasticized optodes. The theoretical conclusions are confirmed by the results obtained with Na+/pH-selective optodes based on a neutral chromoionophore as a model system in solutions containing anions of various lipophilicities (Cl-, NO3-, I-, SCN-, and ClO4-). For the first time, it is shown that coextraction leads to a significant shift of the response range of the optodes as well as to nonmonotonic response curves due to the transition from cationic to anionic response. An approach to estimate the coextraction constants of electrolytes from the optode response curves is proposed. The limitations in the applicability of optodes due to co-ion interference are explored. It is found that neglecting anion interference can cause dramatic errors in the results of analyses with optical sensors.
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Affiliation(s)
- Andrey V. Kalinichev
- Chemistry Institute, Saint Petersburg State University, 26 Universitetskiy prospect, 198504 Saint Petersburg, Russia
| | - Nadezhda V. Pokhvishcheva
- Chemistry Institute, Saint Petersburg State University, 26 Universitetskiy prospect, 198504 Saint Petersburg, Russia
| | - Maria A. Peshkova
- Chemistry Institute, Saint Petersburg State University, 26 Universitetskiy prospect, 198504 Saint Petersburg, Russia
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10
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Jiang C, He Y, Liu Y. Recent advances in sensors for electrochemical analysis of nitrate in food and environmental matrices. Analyst 2020; 145:5400-5413. [PMID: 32572401 DOI: 10.1039/d0an00823k] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Nitrate is one of the most common contaminants in food and the environment and mainly arises from intense human activities. Electrochemical sensors have been considered as one of the most promising analytical tools for the rapid detection of nitrate in food and environmental matrices due to their quick response, high sensitivity, ease of operation and miniaturisation, and low sample and power consumption. In this review, we summarise advances in sensors for electrochemical analysis of nitrate over the past decade. We also discuss the application of electrochemical sensing systems for the determination of nitrate in the matrices of fresh water, seawater, food, soil and particulate matter.
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Affiliation(s)
- Chunbo Jiang
- College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia.
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11
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Pięk M, Paczosa-Bator B, Smajdor J, Piech R. Molecular organic materials intermediate layers modified with carbon black in potentiometric sensors for chloride determination. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.121] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Rearranging the Nernst equation to make a dosage-controllable membrane delivery system. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.08.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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MORIUCHI-KAWAKAMI T, OBITA M, TSUJINAKA T, SHIBUTANI Y. Influence of Introduced Substituents on the Anion-selectivity of [14]Tetraazaannulene Complexes. ANAL SCI 2015; 31:887-93. [DOI: 10.2116/analsci.31.887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Minako OBITA
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology
| | - Toshiki TSUJINAKA
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology
| | - Yasuhiko SHIBUTANI
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology
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14
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Felle HH. Ion-selective Microelectrodes: Their Use and Importance in Modern Plant Cell Biology. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/j.1438-8677.1993.tb00331.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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See HH, Hauser PC. Electro-driven extraction of low levels of lipophilic organic anions and cations across plasticized cellulose triacetate membranes: Effect of the membrane composition. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.08.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Farhadi K, Bonab HS, Maleki R, Shamsipur M, Shargi H. Tetrachlorophenylporphyrinato Manganese(III) Acetate as a New Ionophore for a Coated Triiodide Ion-Selective Electrode. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200200122] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Schmidt-Marzinkowski J, See HH, Hauser PC. Electric Field Driven Extraction of Inorganic Anions Across a Polymer Inclusion Membrane. ELECTROANAL 2013. [DOI: 10.1002/elan.201300176] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Altikatoglu M, Karakus E, Erci V, Pekyardımcı S, Isildak I. Novel creatine biosensors based on all solid-state contact ammonium-selective membrane electrodes. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2012; 41:131-6. [PMID: 22779924 DOI: 10.3109/10731199.2012.696066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Novel creatine bienzymatic potentiometric biosensors were prepared by immobilizing urease and creatinase on all solid-state contact PVC-containing palmitic acid and carboxylated PVC matrix membrane ammonium-selective electrodes without inner reference solution. Potentiometric characteristics of biosensors were examined in physiological model solutions at different creatine concentrations. The linear working range and long-term sensitivity of the biosensors were also determined. The creatine biosensors prepared by using the carboxylated PVC membrane electrodes showed more effective performance than those of the PVC containing palmitic acid membrane electrodes. Creatine assay in serum samples was successfully carried out by using the standard addition method.
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Affiliation(s)
- Melda Altikatoglu
- Yildiz Technical University, Faculty of Arts and Sciences, Department of Chemistry, Davutpasa Campus, Esenler, 34210 Istanbul, Turkey
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19
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Gemene KL, Meyerhoff ME. Selectivity Enhancement for Chloride Ion by In(III)-Porphyrin-Based Polymeric Membrane Electrode Operated in Pulsed Chronopotentiometric Mode. ELECTROANAL 2012; 24:643-648. [PMID: 23355767 DOI: 10.1002/elan.201200021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A robust selectivity enhancement of an In(III)-porphyrin ionophore-based chloride-selective electrode under pulsed chronopotentiometric measurement mode that enables the detection of chloride ions in the presence of a normally interfering concentration of salicylate ions is described. This enhancement is achieved by the rapid depletion of the surface concentration of the more dilute lipophilic anion during an initial anodic current pulse period due to extraction of this preferred anion into the membrane phase. Measurement of chloride with a detection limit of 8 mM and near Nernstian response slope in the presence of 1 mM salicylate is possible using the pulstrode method.
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Affiliation(s)
- Kebede L Gemene
- Department of Chemistry, Northern Kentucky University, Nunn Drive, Highland Height, KY 41099
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20
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Iodide selective membrane electrodes based on a Molybdenum–Salen as a neutral carrier. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Wojciechowski K. Hydration energy or hydration force? Origin of ion-specificity in ion selective electrodes. Curr Opin Colloid Interface Sci 2011. [DOI: 10.1016/j.cocis.2011.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tsoutsi D, Montenegro JM, Dommershausen F, Koert U, Liz-Marzán LM, Parak WJ, Alvarez-Puebla RA. Quantitative surface-enhanced Raman scattering ultradetection of atomic inorganic ions: the case of chloride. ACS NANO 2011; 5:7539-7546. [PMID: 21806049 DOI: 10.1021/nn2025176] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy can be used for the determination and quantification of biologically representative atomic ions. In this work, the detection and quantification of chloride is demonstrated by monitoring the vibrational changes occurring at a specific interface (a Cl-sensitive dye) supported on a silver-coated silica microbead. The engineered particles play a key role in the detection, as they offer a stable substrate to support the dye, with a dense collection of SERS hot spots. These results open a new avenue toward the generation of microsensors for fast ultradetection and quantification of relevant ions inside living organisms such as cells. Additionally, the use of discrete particles rather than rough films, or other conventional SERS supports, will also enable a safe remote interrogation of highly toxic sources in environmental problems or biological fluids.
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Affiliation(s)
- Dionysia Tsoutsi
- Departamento de Química Física, and Unidad Asociada CSIC, Universidade de Vigo, 36310, Vigo, Spain
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Álvarez-Romero G, Ramírez-Silva M, Galán-Vidal C, Páez-Hernández M, Romero-Romo M. Development of a Chloride Ion-Selective Solid State Sensor Based on Doped Polypyrrole-Graphite-Epoxy Composite. ELECTROANAL 2010. [DOI: 10.1002/elan.200900601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Kubán P, Hauser PC. Fundamentals of electrochemical detection techniques for CE and MCE. Electrophoresis 2010; 30:3305-14. [PMID: 19802845 DOI: 10.1002/elps.200900217] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The electroanalytical techniques of amperometry, conductometry and potentiometry match well with the instrumental simplicity of CE. Indeed, all three detection approaches have been reported for electrophoretic separations. However, the characteristics of the three methods are quite distinct and these are not related to the optical methods more commonly employed. A detailed discussion of the underlying principles of each is given. The issue of possible effects of the separation voltage on the electrochemical detection techniques is considered in depth, and approaches to the elimination of such interferences are also discussed for each case.
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Affiliation(s)
- Pavel Kubán
- Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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On the origin of the Hofmeister effect in anion-selective potentiometric electrodes with tetraalkylammonium salts. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.11.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kim Y, Rodgers PJ, Ishimatsu R, Amemiya S. Subnanomolar Ion Detection by Stripping Voltammetry with Solid-Supported Thin Polymeric Membrane. Anal Chem 2009; 81:7262-70. [DOI: 10.1021/ac900995a] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yushin Kim
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260
| | - Patrick J. Rodgers
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260
| | - Ryoichi Ishimatsu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260
| | - Shigeru Amemiya
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260
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Brand A, Dinkel C, Wehrli B. Influence of the diffusive boundary layer on solute dynamics in the sediments of a seiche-driven lake: A model study. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jg000755] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Graefe A, Stanca SE, Nietzsche S, Kubicova L, Beckert R, Biskup C, Mohr GJ. Development and Critical Evaluation of Fluorescent Chloride Nanosensors. Anal Chem 2008; 80:6526-31. [DOI: 10.1021/ac800115u] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Anja Graefe
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Sarmiza E. Stanca
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Sandor Nietzsche
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Lenka Kubicova
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Rainer Beckert
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Christoph Biskup
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
| | - Gerhard J. Mohr
- Institute of Physical Chemistry and Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich-Schiller-University, Jena, Germany, and Institute of Physiology II and Center of Electron Microscopy, Universitätsklinikum, Jena, Germany
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Kim Y, Amemiya S. Stripping analysis of nanomolar perchlorate in drinking water with a voltammetric ion-selective electrode based on thin-layer liquid membrane. Anal Chem 2008; 80:6056-65. [PMID: 18613700 DOI: 10.1021/ac8008687] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly sensitive analytical method is required for the assessment of nanomolar perchlorate contamination in drinking water as an emerging environmental problem. We developed the novel approach based on a voltammetric ion-selective electrode to enable the electrochemical detection of "redox-inactive" perchlorate at a nanomolar level without its electrolysis. The perchlorate-selective electrode is based on the submicrometer-thick plasticized poly(vinyl chloride) membrane spin-coated on the poly(3-octylthiophene)-modified gold electrode. The liquid membrane serves as the first thin-layer cell for ion-transfer stripping voltammetry to give low detection limits of 0.2-0.5 nM perchlorate in deionized water, commercial bottled water, and tap water under a rotating electrode configuration. The detection limits are not only much lower than the action limit (approximately 246 nM) set by the U.S. Environmental Protection Agency but also are comparable to the detection limits of the most sensitive analytical methods for detecting perchlorate, that is, ion chromatography coupled with a suppressed conductivity detector (0.55 nM) or electrospray ionization mass spectrometry (0.20-0.25 nM). The mass transfer of perchlorate in the thin-layer liquid membrane and aqueous sample as well as its transfer at the interface between the two phases were studied experimentally and theoretically to achieve the low detection limits. The advantages of ion-transfer stripping voltammetry with a thin-layer liquid membrane against traditional ion-selective potentiometry are demonstrated in terms of a detection limit, a response time, and selectivity.
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Affiliation(s)
- Yushin Kim
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, USA
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Rodgers PJ, Jing P, Kim Y, Amemiya S. Electrochemical recognition of synthetic heparin mimetic at liquid/liquid microinterfaces. J Am Chem Soc 2008; 130:7436-42. [PMID: 18479109 DOI: 10.1021/ja800568q] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrochemically controlled molecular recognition of a synthetic heparin mimetic, Arixtra, at nitrobenzene/water microinterfaces was investigated to obtain a greater understanding of interfacial recognition and sensing of heparin and its analogues with biomedical importance. In contrast to unfractionated heparin, this synthetic pentasaccharide that mimics the unique Antithrombin III binding domain of heparin possesses well-defined structure and ionic charge to enable quantitative interpretation of cyclic voltammetric/chronoamperometric responses based on the interfacial recognition at micropipet electrodes. Arixtra is electrochemically extracted from the water phase into the bulk nitrobenzene phase containing highly lipophilic ionophores, methyltridodecylammonium or dimethyldioctadecylammonium. Numerical analysis of the kinetically controlled cyclic voltammograms demonstrates for the first time that formal potentials and standard rate constants of polyion transfer at liquid/liquid interfaces are ionophore dependent. Moreover, octadecylammonium and octadecylguanidinium are introduced as new, simple ionophores to model recognition sites of heparin-binding proteins at liquid/liquid interfaces. In comparison to octadecyltrimethylammonium, the best ionophore for heparin recognition at liquid/liquid interfaces reported so far, these new ionophores dramatically facilitate Arixtra adsorption at the interfaces. With a saline solution at physiological pH, an Arixtra molecule is selectively and cooperatively bound to 5 molecules of the guanidinium ionophore, suggesting hydrogen-bond-directed interactions of each guanidinium with a few of 10 negatively charged sulfo or carboxyl groups of Arixtra at the interfaces.
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Affiliation(s)
- Patrick J Rodgers
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania, 15260, USA
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Wang L, Meyerhoff ME. Polymethacrylate polymers with appended aluminum(III)-tetraphenylporphyrins: Synthesis, characterization and evaluation as macromolecular ionophores for electrochemical and optical fluoride sensors. Anal Chim Acta 2008; 611:97-102. [PMID: 18298973 DOI: 10.1016/j.aca.2008.01.070] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 01/21/2008] [Accepted: 01/26/2008] [Indexed: 11/17/2022]
Abstract
The synthesis and characterization of a novel polymethacylate polymer with covalently linked Al(III)-tetraphenylporphyrin (Al(III)-TPP) groups is reported. The new polymer is examined as a potential macromolecular ionophore for the preparation of polymeric membrane-based potentiometric and optical fluoride selective sensors. To prepare the polymer, an Al(III) porphyrin monomer modified with a methacrylate functionality is synthesized, allowing insertion into a polymethacrylate block copolymer (methyl methacrylate and decyl methacrylate) backbone. The resulting polymer can then be incorporated, along with appropriate additives, into conventional plasticized poly(vinyl chloride) films for testing electrochemical and optical fluoride response properties. The covalent attachment of the Al(III)-TPP ionophore to the copolymer matrix provides potentiometric sensors that exhibit significant selectivity for fluoride ion with extended lifetimes (compared to ion-selective membrane electrodes formulated with conventional free Al(III)-TPP structure). However, quite surprisingly, the attachment of the ionophore to the polymer does not eliminate the interaction of Al(III)-TPP structures to form dimeric species within the membrane phase in the presence of fluoride ion. Such interactions are confirmed by UV/visible spectroscopy of the blended polymeric films. Use of the new polymer-Al(III)-TPP conjugates to prepare optical fluoride sensors by co-incorporating a lipophilic pH indicator (4',5'-dibromofluorescein octadecyl ester; ETH7075) is also examined and the resulting optical sensing films are shown to exhibit excellent selectivity for fluoride, with the potential for prolonged operational lifetime.
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Affiliation(s)
- Lin Wang
- University of Michigan, Department of Chemistry, 930 N. University, Ann Arbor, MI 48109-1055, USA
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Ishimatsu R, Nishi N, Kakiuchi T. Interfacial ion pairing at the interface between water and a room-temperature ionic liquid, N-tetradecylisoquinolinium bis(pentafluoroethylsulfonyl)imide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:7608-11. [PMID: 17552548 DOI: 10.1021/la700884q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The specific interaction of N-tetradecylisoquinolinium (C(14)Iq+) with Cl- and Br- has been detected in the voltammetry of ion transfer and electrocapillarity at the interface between an aqueous solution (W) and a room-temperature ionic liquid (RTIL), N-tetradecylisoquinolinium bis(pentafluoroethylsulfonyl)imide ([C(14)Iq+][C(2)C(2)N-]). This specific interaction also makes the transfer of Cl- and Br- into [C(14)Iq+][C(2)C(2)N-] energetically more favorable in comparison with that of F- and SO(4)(2-). The width of the polarized potential window in ion-transfer voltammetry at the [C(14)Iq+][C(2)C(2)N-]|W interface is significantly narrower because of the transfer of anions from W to RTIL. The degree of affinity of the anion with C(14)Iq+ agrees with the Hofmeister series. Such an ion-pair formation of anions in W with cations in the RTIL is much weaker when the cation constituting the RTIL is a symmetric tetraheptylammonium ion.
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Affiliation(s)
- Ryoichi Ishimatsu
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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34
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Wygladacz K, Bakker E. Fluorescent microsphere fiber optic microsensor array for direct iodide detection at low picomolar concentrations. Analyst 2007; 132:268-72. [PMID: 17325761 DOI: 10.1039/b614562k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescent optode microspheres doped with the halide-selective receptor [9]mercuracarborand-3 and a lipophilic pH fluoroionophore were found to exhibit picomolar limits of detection to iodide at pH 3.5, and were used to monitor the precipitation of iodide by silver ions at subnanomolar concentrations, just above their calculated solubility.
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Affiliation(s)
- Katarzyna Wygladacz
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA
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35
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Schazmann B, Diamond D. Improved nitrate sensing using ion selective electrodes based on urea–calixarene ionophores. NEW J CHEM 2007. [DOI: 10.1039/b702841p] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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37
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Karakuş E, Pekyardımcı Ş, Kılıç E. Potentiometric bienzymatic biosensor based on PVC membrane containing palmitic acid for determination of creatine. Process Biochem 2006. [DOI: 10.1016/j.procbio.2006.01.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Mazloum Ardakani M, Jamshidpour M, Naeimi H, Moradi L. Thiocyanate Ion-selective PVC Membrane Electrode Based on N,N'-Ethylene-bis(4-methylsalicylidineiminato)nickel(II). ANAL SCI 2006; 22:1221-6. [PMID: 16966813 DOI: 10.2116/analsci.22.1221] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A highly selective poly(vinyl chloride) (PVC) membrane electrode based on an N,N'-ethylene-bis(4-methyl-salicylidineiminato) nickel(II) [Ni(EBMSI)] complex as a carrier for a thiocyanate-selective electrode is reported. The influences of the membrane composition, pH and possible interfering anions were investigated based on the response properties of the electrode. The electrode exhibited a good Nernstian slope of -58.9 +/- 0.7 mV decade(-1), over a wide pH range of 3.5 - 8.5 and a linear range of 1.0 x 10(-6) - 1.0 x 10(-1) M for thiocyanate. The detection limit of electrode was 3.1 x 10(-7) M SCN(-). The selectivity coefficients determined by a fixed interference method (FIM) indicate that a good discriminating ability towards the SCN- ion compared to other anions. The proposed sensor had a fast response time of about 5 - 15 s and could be used for at least 3 months without any considerable divergence in the potential. It was applied as an indicator electrode in the titration of thiocyanate with Ag+ and in the potentiometric determination of thiocyanate in saliva and urine samples.
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Yamaguchi A, Watanabe J, Mahmoud MM, Fujiwara R, Morita K, Yamashita T, Amino Y, Chen Y, Radhakrishnan L, Teramae N. Extraction mechanisms of charged organic dye molecules into silica-surfactant nanochannels in a porous alumina membrane. Anal Chim Acta 2006; 556:157-63. [PMID: 17723343 DOI: 10.1016/j.aca.2005.06.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2005] [Revised: 06/07/2005] [Accepted: 06/08/2005] [Indexed: 11/21/2022]
Abstract
Extraction mechanisms of charged organic dye molecules are examined for an assembly of silica-surfactant nanochannels with a channel diameter of 3.4 nm, which is formed inside the pores of an anodic alumina membrane by a surfactant-template method. Experimental results confirm that the extraction mechanism depends on the sign of a charge of the dye molecules. The extraction of the cationic rhodamine 6G is predominantly caused by an ion-pair extraction process, whereas an anion-exchange process is mainly responsible for the extraction of the anionic sulforhodamine B. These extraction mechanisms are discussed by considering the microstructures of the silica-surfactant nanochannels.
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Affiliation(s)
- Akira Yamaguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
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40
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Lukow S, Kounaves S. Analysis of Simulated Martian Regolith Using an Array of Ion Selective Electrodes. ELECTROANAL 2005. [DOI: 10.1002/elan.200503292] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Ardakani MM, Jalayer MS, Safari J, Sadeghi Z, Zare HR. Salicylate poly(vinyl chloride) membrane electrode based on (2-[(E)-2-(4-nitrophenyl) hydrazono]-1-phenyl-2-(2-quinolyl)-1-ethanone) Cu(II). Anal Biochem 2005; 341:259-66. [PMID: 15907871 DOI: 10.1016/j.ab.2005.03.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2004] [Indexed: 10/25/2022]
Abstract
A new salicylate-selective electrode based on the complex of (2-[(E)-2-(4-nitrophenyl)hydrazono]-1-phenyl-2-(2-quinolyl)-1-ethanone) Cu(II) as the membrane carrier was developed. The electrode exhibited a good Nernstian slope of -59.6+/-1.0 mV/decade and a linear range of 1.0 x 10(-6) to 1.0M for salicylate. The limit of detection was 5.0 x 10(-7) M. The electrode had a fast response time of 10 s and can be used for more than 3 months. The selective coefficients were determined by the fixed interference method and could be used in the pH range of 4.0 to 10.5. The electrode was employed as an indicator electrode for direct determination of salicylate in pharmaceutical and biological samples.
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Affiliation(s)
- M Mazloum Ardakani
- Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran.
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42
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Gupta VK, Ludwig R, Agarwal S. Anion recognition through modified calixarenes: a highly selective sensor for monohydrogen phosphate. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.02.008] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Legin A, Makarychev-Mikhailov S, Mortensen J, Vlasov Y. Potentiometric and impedance studies of membranes based on anion-exchanger and lipophilic inert electrolyte ETH 500. Electrochim Acta 2004. [DOI: 10.1016/j.electacta.2004.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Wuthier U, Pham HV, Pretsch E, Ammann D, Beck AK, Seebach D, Simon W. Zur Anionenselektivität von Distannylderivaten in Membranen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19850680703] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Solvent polymeric membranes based on tridodecylmethylammonium chloride studied by potentiometry and electrochemical impedance spectroscopy. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2004.03.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Demirel A, Doğan A, Canel E, Memon S, Yilmaz M, Kilic E. Hydrogen ion-selective poly(vinyl chloride) membrane electrode based on a p-tert-butylcalix[4]arene-oxacrown-4. Talanta 2004; 62:123-9. [PMID: 18969273 DOI: 10.1016/s0039-9140(03)00414-4] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2003] [Revised: 06/26/2003] [Accepted: 07/03/2003] [Indexed: 11/16/2022]
Affiliation(s)
- Ayça Demirel
- Department of Chemistry, Faculty of Science, Ankara University, Ankara, Turkey
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Malon A, Radu A, Qin W, Qin Y, Ceresa A, Maj-Zurawska M, Bakker E, Pretsch E. Improving the Detection Limit of Anion-Selective Electrodes: An Iodide-Selective Membrane with a Nanomolar Detection Limit. Anal Chem 2003; 75:3865-71. [PMID: 14572055 DOI: 10.1021/ac026454r] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The lower detection limit and the selectivity behavior of anion-selective electrodes (ISEs) are improved by using optimized inner solutions and membrane compositions. With a membrane based on the recently described ionophore [9]mercuracarborand-3, a detection limit of 2 x 10(-9) M has been achieved for iodide. Nevertheless, the improvements are less pronounced than in the case of cation ISEs. This is mainly due to the fact that so far no anion ISE is known with the extremely high selectivities of cation ISEs. If the membrane does not contain an ionophore, leaching of the ion exchanger from the membrane into the sample is also a relevant limiting factor except for ion exchangers of very high lipophilicity.
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Affiliation(s)
- Adam Malon
- Laboratorium für Organische Chemie, ETH Hönggerberg, CH-8093 Zürich, Switzerland
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49
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Kounaves SP, Lukow SR, Comeau BP, Hecht MH, Grannan-Feldman SM, Manatt K, West SJ, Wen X, Frant M, Gillette T. Mars Surveyor Program '01 Mars Environmental Compatibility Assessment wet chemistry lab: A sensor array for chemical analysis of the Martian soil. ACTA ACUST UNITED AC 2003; 108:13-1 - 13-12. [PMID: 14686320 DOI: 10.1029/2002je001978] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The Mars Environmental Compatibility Assessment (MECA) instrument was designed, built, and flight qualified for the now canceled MSP (Mars Surveyor Program) '01 Lander. The MECA package consisted of a microscope, electrometer, material patch plates, and a wet chemistry laboratory (WCL). The primary goal of MECA was to analyze the Martian soil (regolith) for possible hazards to future astronauts and to provide a better understanding of Martian regolith geochemistry. The purpose of the WCL was to analyze for a range of soluble ionic chemical species and electrochemical parameters. The heart of the WCL was a sensor array of electrochemically based ion-selective electrodes (ISE). After 20 months storage at -23 degrees C and subsequent extended freeze/thawing cycles, WCL sensors were evaluated to determine both their physical durability and analytical responses. A fractional factorial calibration of the sensors was used to obtain slope, intercept, and all necessary selectivity coefficients simultaneously for selected ISEs. This calibration was used to model five cation and three anion sensors. These data were subsequently used to determine concentrations of several ions in two soil leachate simulants (based on terrestrial seawater and hypothesized Mars brine) and four actual soil samples. The WCL results were compared to simulant and soil samples using ion chromatography and inductively coupled plasma optical emission spectroscopy. The results showed that flight qualification and prolonged low-temperature storage conditions had minimal effects on the sensors. In addition, the analytical optimization method provided quantitative and qualitative data that could be used to accurately identify the chemical composition of the simulants and soils. The WCL has the ability to provide data that can be used to "read" the chemical, geological, and climatic history of Mars, as well as the potential habitability of its regolith.
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Affiliation(s)
- Samuel P Kounaves
- Department of Chemistry, Tufts University, Medford, Massachusetts, USA
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50
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