1
|
Ali M, Maurya RR, Singh J, Negi PS, Rajor HK, Bahadur I. Schiff base complexes of Cu(II) and Ni(II) derived from N,N'-bis(salicylidene)-o-phenylenediamine as potential ionophores in the construction of PVC membrane iodide sensors. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
2
|
Seah GEKK, Tan AYX, Neo ZH, Lim JYC, Goh SS. Halogen Bonding Ionophore for Potentiometric Iodide Sensing. Anal Chem 2021; 93:15543-15549. [PMID: 34767713 DOI: 10.1021/acs.analchem.1c03719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Iodide (I-) is an essential micronutrient for thyroid function. Hence, rapid and portable sensing is important for I- quantification in food and biological samples. Herein, we report the first example of a halogen bonding (XB) tripodal ionophore (XB1) which is selective for the I- anion. NMR binding studies of XB1 and its H-triazole analog HB2 with I- demonstrated the dominant influence of XB interactions between the ionophore and the I- analyte. The phase boundary model was applied to formulate iodide-selective electrodes with the ionophore XB1. The optimal electrode exhibited a near-Nernstian response of -51.9 mV per decade within a large dynamic range (10-1 to 10-6 M) and notably anti-Hofmeister selectivity for I- over thiocyanate (SCN-), enabling the in situ determination of I- in complex samples. This work establishes XB as a viable supramolecular interaction in the potentiometric sensing of anions.
Collapse
Affiliation(s)
- Georgina E K K Seah
- Institute of Material Research and Engineering, A*STAR (Agency for Science, Technology and Research) Research Entities, 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore
| | - Angeline Y X Tan
- Institute of Material Research and Engineering, A*STAR (Agency for Science, Technology and Research) Research Entities, 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore
| | - Zhi Hao Neo
- Institute of Material Research and Engineering, A*STAR (Agency for Science, Technology and Research) Research Entities, 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore
| | - Jason Y C Lim
- Institute of Material Research and Engineering, A*STAR (Agency for Science, Technology and Research) Research Entities, 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore.,Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117576, Singapore
| | - Shermin S Goh
- Institute of Material Research and Engineering, A*STAR (Agency for Science, Technology and Research) Research Entities, 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Singapore
| |
Collapse
|
3
|
Ghaedi M, Jaberi SYS, Hajati S, Montazerozohori M, Zarr M, Asfaram A, Kumawat LK, Gupta VK. Preparation of Iodide Selective Carbon Paste Electrode with Modified Carbon Nanotubes by Potentiometric Method and Effect of CuS-NPs on Its Response. ELECTROANAL 2015. [DOI: 10.1002/elan.201400686] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
4
|
Memon AA, Solangi AR, Memon S, Bhatti AA, Bhatti AA. Highly Selective Determination of Perchlorate by a Calix[4]arene based Polymeric Membrane Electrode. Polycycl Aromat Compd 2015. [DOI: 10.1080/10406638.2014.948121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Ganjali MR, Shirvani-Arani S, Bidhendi GN, Norouzi P, Salavati-Niasari M. Highly Selective and Sensitive Triiodide PVC-Membrane Electrode Based on a New Charge-Transfer Complex of Bis(2,4-Dimethoxybenzaldehyde)butane-2,3-Dihydrazone with Iodine. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200600033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
6
|
Maleki R, Hosseinzadeh R, Matin AA, Farhadi K. Ketoconazol-Triiodide Ion Pair Complex as a Suitable Carrier in an Iodide Selective Membrane Electrode. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
7
|
Javanbakht M, Mohammadi A, Ganjali MR, Norouzi P, Faridbod F, Pirelahi H. PVC-Based on Thiopyrilium Derivatives Membrane Electrodes for Determination of Histamine. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700211] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
8
|
Novel thiocyanate ion-selective electrodes based on a copper(II) complex of p-hydroxyacetophenone thiosemicarbazone as a carrier. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-012-0884-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
9
|
Abbasi MA, Ibupoto ZH, Hussain M, Khan Y, Khan A, Nur O, Willander M. Potentiometric zinc ion sensor based on honeycomb-like NiO nanostructures. SENSORS 2012. [PMID: 23202217 PMCID: PMC3522970 DOI: 10.3390/s121115424] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study honeycomb-like NiO nanostructures were grown on nickel foam by a simple hydrothermal growth method. The NiO nanostructures were characterized by field emission electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) techniques. The characterized NiO nanostructures were uniform, dense and polycrystalline in the crystal phase. In addition to this, the NiO nanostructures were used in the development of a zinc ion sensor electrode by functionalization with the highly selective zinc ion ionophore 12-crown-4. The developed zinc ion sensor electrode has shown a good linear potentiometric response for a wide range of zinc ion concentrations, ranging from 0.001 mM to 100 mM, with sensitivity of 36 mV/decade. The detection limit of the present zinc ion sensor was found to be 0.0005 mM and it also displays a fast response time of less than 10 s. The proposed zinc ion sensor electrode has also shown good reproducibility, repeatability, storage stability and selectivity. The zinc ion sensor based on the functionalized NiO nanostructures was also used as indicator electrode in potentiometric titrations and it has demonstrated an acceptable stoichiometric relationship for the determination of zinc ion in unknown samples. The NiO nanostructures-based zinc ion sensor has potential for analysing zinc ion in various industrial, clinical and other real samples.
Collapse
Affiliation(s)
- Mazhar Ali Abbasi
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
- Author to whom correspondence should be addressed; E-Mail:
| | - Zafar Hussain Ibupoto
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
| | - Mushtaque Hussain
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
| | - Yaqoob Khan
- Nanosciences and Catalysis Division, National Centre for Physics, Quaid-e-Azam University Campus, 45320 Islamabad, Pakistan; E-Mail:
| | - Azam Khan
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
| | - Omer Nur
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
| | - Magnus Willander
- Physical Electronic and Nanotechnology Division, Department of Science and Technology, Campus Norrköping, Linköping University, SE-60174 Norrköping, Sweden; E-Mails: (Z.H.I.); (M.H.); (A.K.); (O.N.); (M.W.)
| |
Collapse
|
10
|
|
11
|
Ghaedi M, Montazerozohori M, Mousavi A, Khodadoust S, Mansouri M. Construction of new iodide selective electrodes based on bis(trans-cinnamaldehyde)1,3-propanediimine(L) zinc(II) chloride [ZnLCl2] and bis(trans-cinnamaldehyde) 1,3-propanediimine(L) cadmium(II) chloride [CdLCl2]. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2011.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
12
|
|
13
|
Hosseini M, Ganjali MR, Veismohammadi B, Faridbod F, Abkenar SD, Salavati-Niasari M. Selective recognition of acetate ion based on fluorescence enhancement chemosensor. LUMINESCENCE 2012; 27:341-5. [DOI: 10.1002/bio.1354] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 06/30/2011] [Accepted: 08/07/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Morteza Hosseini
- Department of Life Science Engineering, Faculty of New Sciences and Technologies; Unversity of Tehran; Tehran; Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, Faculty of Chemistry; University of Tehran; Tehran; Iran
| | - Bahareh Veismohammadi
- Center of Excellence in Electrochemistry, Faculty of Chemistry; University of Tehran; Tehran; Iran
| | - Farnoush Faridbod
- Endocrinology and Metabolism Research Center; Tehran University of Medical Science; Tehran; Iran
| | | | | |
Collapse
|
14
|
Rapid automated method for on-site determination of sulfadiazine in fish farming: a stainless steel veterinary syringe coated with a selective membrane of PVC serving as a potentiometric detector in a flow-injection-analysis system. Anal Bioanal Chem 2011; 401:3355-65. [DOI: 10.1007/s00216-011-5441-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 09/06/2011] [Accepted: 09/23/2011] [Indexed: 11/29/2022]
|
15
|
Ganjali MR, Hosseini M, Aboufazeli F, Faridbod F, Goldooz H, Badiei AR. A highly selective fluorescent probe for pyrophosphate detection in aqueous solutions. LUMINESCENCE 2011; 27:20-3. [DOI: 10.1002/bio.1316] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 02/06/2011] [Accepted: 04/08/2011] [Indexed: 11/09/2022]
Affiliation(s)
- M. R. Ganjali
- Centre of Excellence in Electrochemistry; Faculty of Chemistry; University of Tehran; Iran
| | - M. Hosseini
- Department of Chemistry; Islamic Azad University; Savadkooh; Iran
| | - F. Aboufazeli
- Centre of Excellence in Electrochemistry; Faculty of Chemistry; University of Tehran; Iran
| | - F. Faridbod
- Endocrinology and Metabolism Research Centre; Tehran University of Medical Sciences; Iran
| | - H. Goldooz
- School of Chemistry; University College of Science; University of Tehran; Iran
| | - A. R. Badiei
- School of Chemistry; University College of Science; University of Tehran; Iran
| |
Collapse
|
16
|
Hosseini M, Abkenar SD, Ganjali M, Faridbod F. Determination of zinc(II) ions in waste water samples by a novel zinc sensor based on a new synthesized Schiff's base. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2010.10.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
17
|
Lvova L, Verrelli G, Stefanelli M, Nardis S, Di Natale C, Amico AD, Makarychev-Mikhailov S, Paolesse R. Platinum porphyrins as ionophores in polymeric membrane electrodes. Analyst 2011; 136:4966-76. [DOI: 10.1039/c1an15069c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Mahajan RK, Nandni D, Puri RK. Novel Perchlorate Selective Electrode Based on Neutral Surfactant Ion-Pair Complex of Dodecyltrimethylammonium-Perchlorate. ANAL LETT 2010. [DOI: 10.1080/00032711003704271] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
19
|
Rezaei B, Meghdadi S, Bagherpour S. Perchlorate-selective polymeric membrane electrode based on bis(dibenzoylmethanato)cobalt(II) complex as a neutral carrier. JOURNAL OF HAZARDOUS MATERIALS 2009; 161:641-648. [PMID: 18486336 DOI: 10.1016/j.jhazmat.2008.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2007] [Revised: 02/13/2008] [Accepted: 04/01/2008] [Indexed: 05/26/2023]
Abstract
A synthesized bis(dibenzoylmethanato)Co(II) complex (Co(DBM)(2)), has been used as a ionophore for the preparation of a new perchlorate ion-selective electrode. The electrode exhibits a Nernstian response over the perchlorate concentration range of 8.0x10(-7)-1.0x10(-1)M with a slope of 60.3+/-0.5 mV per decade of concentration. The limit of detection as determined from the intersection of the extrapolated linear segments of the calibration plot is 5.6x10(-7)M. The electrode shows good selectivity towards perchlorate with respect to many common anions. The response time of the sensor is very fast (< or = 5s), and can be used for at least 2 months in the pH range of 2.0-9.0. The electrode was used to determine perchlorate in water and human urine. The interaction of the ionophore with perchlorate ions was demonstrated by UV-vis spectroscopy.
Collapse
Affiliation(s)
- Behzad Rezaei
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
| | | | | |
Collapse
|
20
|
Faridbod F, Norouzi P, Dinarvand R, Ganjali MR. Developments in the Field of Conducting and Non-conducting Polymer Based Potentiometric Membrane Sensors for Ions Over the Past Decade. SENSORS (BASEL, SWITZERLAND) 2008; 8:2331-2412. [PMID: 27879825 PMCID: PMC3673421 DOI: 10.3390/s8042331] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Accepted: 04/02/2008] [Indexed: 12/07/2022]
Abstract
Many research studies have been conducted on the use of conjugated polymers in the construction of chemical sensors including potentiometric, conductometric and amperometric sensors or biosensors over the last decade. The induction of conductivity on conjugated polymers by treating them with suitable oxidizing agents won Heeger, MacDiarmid and Shirakawa the 2000 Nobel Prize in Chemistry. Common conjugated polymers are poly(acetylene)s, poly(pyrrole)s, poly(thiophene)s, poly(terthiophene)s, poly(aniline)s, poly(fluorine)s, poly(3-alkylthiophene)s, polytetrathiafulvalenes, polynapthalenes, poly(p-phenylene sulfide), poly(p-phenylenevinylene)s, poly(3,4-ethylenedioxythiophene), polyparaphenylene, polyazulene, polyparaphenylene sulfide, polycarbazole and polydiaminonaphthalene. More than 60 sensors for inorganic cations and anions with different characteristics based on conducting polymers have been reported. There have also been reports on the application of non-conducting polymers (nCPs), i.e. PVC, in the construction of potentiometric membrane sensors for determination of more than 60 inorganic cations and anions. However, the leakage of ionophores from the membranes based on these polymers leads to relatively lower life times. In this article, we try to give an overview of Solid-Contact ISE (SCISE), Single-Piece ISE (SPISE), Conducting Polymer (CP)-Based, and also non-conducting polymer PVC-based ISEs for various ions which their difference is in the way of the polymer used with selective membrane. In SCISEs and SPISEs, the plasticized PVC containing the ionophore and ionic additives govern the selectivity behavior of the electrode and the conducting polymer is responsible of ion-to-electron transducer. However, in CPISEs, the conducting polymer layer is doped with a suitable ionophore which enhances the ion selectivity of the CP while its redox response has to be suppressed.
Collapse
Affiliation(s)
- Farnoush Faridbod
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
| | - Parviz Norouzi
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
| | - Rassoul Dinarvand
- Medical Nanotechnology Research Centre, Medical Sciences/University of Tehran, Tehran, P.O. Box 14155-6451, Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.
| |
Collapse
|
21
|
Javanbakht M, Ganjali MR, Norouzi P, Abdouss M, Riahi S. Development of Polymeric Membrane Sensor for the Determination of Histamine: Experimental and Theoretical Study. ANAL LETT 2008. [DOI: 10.1080/00032710801910775] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
22
|
Shokrollahi A, Ghaedi M, Montazerozohori M, Hosaini O, Ghaedi H. Construction of Suitable Iodide–Selective Electrode Based on Phenyl Mercury (II)(2‐mercaptobezothiozolate) Carrier. ANAL LETT 2007. [DOI: 10.1080/00032710701298602] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
23
|
Ganjali MR, Norouzi P, Shirvani-Arani S, Kakanezhadifard A. Synthesis of a charge-transfer complex of (1,3-diphenyldihydro-1H-imidazole)-4,5-dione dioxide with iodide and its application to the development of a highly selective and sensitive triiodide PVC-membrane electrode. JOURNAL OF ANALYTICAL CHEMISTRY 2007. [DOI: 10.1134/s106193480703015x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
24
|
Ganjali MR, Moghaddamb MR, Norouzi P, Shirvani‐Arani S, Daneshgar P, Adib M, Sobhi HR. Highly Selective and Sensitive Triiodide PVC‐Based Membrane Electrode Based on a New Charge Transfer Complex of 2‐(((2‐(((E)‐1‐(2‐Hydroxyphenyl) Methylidine) Amino) Phenyl) Imino) Methyl) Phenol for Nano‐Level Monitoring of Triiodide. ANAL LETT 2006. [DOI: 10.1080/00032710600610816] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
25
|
Zamani HA, Malekzadegan F, Ganjali MR. Highly selective and sensitive thiocyanate membrane electrode based on nickel(II)-1,4,8,11,15,18,22,25-octabutoxyphthalocyanine. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2005.09.026] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
26
|
Novel Triiodide PVC-Based Membrane Sensor Based on a Charge Transfer Complex of Iodine and Bis(2-hydroxyacetophenone)butane-2,3-dihydrazone. B KOREAN CHEM SOC 2005. [DOI: 10.5012/bkcs.2005.26.11.1738] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
27
|
Ghaedi M, Shojaie A, Montazerozohori M, Karami B, Gharaghani S. Iodide-Selective Electrodes Based on Bis[N(2-methyl-phenyl) 4-Nitro-thiobenzamidato]mercury(II) and Bis[N-phenyl 3,5-Dinitro-thiobenzamidato]mercury(II) Carriers. ELECTROANAL 2005. [DOI: 10.1002/elan.200503278] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
28
|
A novel chemically modified carbon paste electrode based on a new mercury(II) complex for selective potentiometric determination of bromide ion. J Solid State Electrochem 2005. [DOI: 10.1007/s10008-005-0692-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
29
|
Martínez V, García N, Antigüedad I, Alonso RM, Jiménez RM. Capillary electrophoresis as a useful tool for the analysis of chemical tracers applied to hydrological systems. J Chromatogr A 2004; 1032:237-42. [PMID: 15065801 DOI: 10.1016/j.chroma.2003.11.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A capillary electrophoretic method was optimised for the separation and determination of iodide used as artificial tracer in hydrology. The influence of the buffer concentration and pH, electroosmotic flow modifier concentration (cetyltrimethylammonium bromide (CTAB)), the injection time and voltage applied, on the electrophoretic separation was studied. A running buffer of 20 mM phosphate (pH 8) containing 1 mM CTAB was found to provide the optimum separation of iodide with respect to resolution, migration time and selectivity. The water samples were injected hydrostatically at 10 cm for 110 s, the voltage applied was -20 kV and a detection wavelength of 214 nm. The influence of the sulphite added to water samples in order to prevent the oxidation of iodide to iodate was also studied. This method can be applied to the determination of iodide free of sulphite interference up to at least a ratio of 1:1000 (I(-):SO3(2-)). The other inorganic anions, which are present in the water samples (mainly chloride, sulphate, nitrate, carbonate), do not interfere with the determination of iodide. This method allows the simultaneous determination of bromide, nitrite, and nitrate together with iodide. The electrophoretic method showed to be linear from 0.5 to 5 mg l(-1) of iodide (the migration time was 2.6 min) with a quantitation limit of 0.45 mg l(-1) and a intraday repeatability lower than 4% of R.S.D. at different concentration levels.
Collapse
Affiliation(s)
- V Martínez
- Departamento de Química Analítica, Facultad de Ciencias, Universidad del País Vasco/EHU, Apdo. 664, 48080 Bilbao, Spain
| | | | | | | | | |
Collapse
|
30
|
Ganjali MR, Mizani F, Salavati-Niasari M. Novel monohydrogenphosphate sensor based on vanadyl salophen. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00075-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
|
32
|
Ganjali MR, Abdi M, Pirelahi H, Mouradzadegun A, Sohrabi MR. Novel Imidazole PVC-Based Sensor Based on a Thiopyrilium Compound. ANAL SCI 2003; 19:1387-90. [PMID: 14596403 DOI: 10.2116/analsci.19.1387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel imidazole membrane sensor based on 2,4,6-triphenyl thiopyrilium perchlorate (TTP) as an excellent charged carrier, poly(vinyl chloride) (PVC), the plasticizer dibutyl phthalate (DBP) and oleic acid as an additive is described. The sensor responds to imidazole over a wide concentration range from 1.0 x 10(-5) to 1.0 x 10(-1) M with a slope of +33.5 +/- 0.5 mV per decade. The detection limit of the electrode is 3.0 x 10(-6) M and it can be used for at least four weeks without any measurable change in sensitivity. The sensitivity of the electrode is high enough to permit the detection of as little as 0.2 microg/ml of imidazole without any significant interference from high levels of other components and especially, amino acids. The potentiometric selectivity coefficient data revealed negligible interference from common cations, anions and amino acids. The electrode has a relatively fast response time (<30 s), and good slope stability. The proposed sensor was successfully applied to the determination of imidazole in synthetic serum samples.
Collapse
|