Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors
Polyvinyl chloride (PVC) based membranes of 18-crown-6 (18C6), dibenzo 18-crowen-6 (DB18C6) and calix[6]arene (CAX), as ionophores, with dioctylphenylphosphonate (DOPP), bis(ethylhexyl)sebacate (DOS) dioctyl phthalate (DOP), 2-nitrophenyloctylether (o-NPOE) and didecylphthalate (DDP) as plasticizing...
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| Format: | Article |
| Language: | English |
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Elsevier
2016-09-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535211002504 |
| _version_ | 1818559580291989504 |
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| author | Magda A. Akl Mohammed H. Abd El-Aziz |
| author_facet | Magda A. Akl Mohammed H. Abd El-Aziz |
| author_sort | Magda A. Akl |
| collection | DOAJ |
| description | Polyvinyl chloride (PVC) based membranes of 18-crown-6 (18C6), dibenzo 18-crowen-6 (DB18C6) and calix[6]arene (CAX), as ionophores, with dioctylphenylphosphonate (DOPP), bis(ethylhexyl)sebacate (DOS) dioctyl phthalate (DOP), 2-nitrophenyloctylether (o-NPOE) and didecylphthalate (DDP) as plasticizing solvent mediators are prepared and constructed for the determination of Zn(II). Of the 15 membranes constructed, only the PVC based membranes of DB18C6 and 18C6 ionophores with DOPP, as plasticizer, in the ratio (w/w) PVC:ionophore:DOPP (60:2:120) give the best results in terms of working concentration range (1.0 × 10−5–1.0 × 10−1 M) with a Nernstian slope of 29.0 mV/decade of activity for membrane composed of DOPP + DB18C6(1a) and (1.0 × 10−5–1.0 × 10−1 M) with a Nernstian slope of 30.0 mV/decade of activity for membrane composed of DOPP + 18C6(1b). The usable pH range of the sensors is 3.0–8.0, beyond which a drift in potential is observed. The response time of the sensors is ⩽15 s with a lifetime of 2 months during which they can be used without any measurable divergence. The selectivity coefficient values indicate that the electrode is highly selective for Zn2+ over a number of other cations except Pb2+ and Ag+. The electrodes have successfully been used to determine Zn(II) in real alloys and standard samples with a precision as relative standard deviation (RSD) <2% for each of the cited electrodes. The results obtained by the proposed ISEs are in good agreement with the results obtained by direct flame AAS method. |
| first_indexed | 2024-12-14T00:27:23Z |
| format | Article |
| id | doaj.art-eb409640695148468dac1bca1be379b9 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-14T00:27:23Z |
| publishDate | 2016-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-eb409640695148468dac1bca1be379b92022-12-21T23:25:00ZengElsevierArabian Journal of Chemistry1878-53522016-09-019S1S878S88810.1016/j.arabjc.2011.09.009Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensorsMagda A. Akl0Mohammed H. Abd El-Aziz1Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, EgyptCentral Laboratory, Egyptian Railways, EgyptPolyvinyl chloride (PVC) based membranes of 18-crown-6 (18C6), dibenzo 18-crowen-6 (DB18C6) and calix[6]arene (CAX), as ionophores, with dioctylphenylphosphonate (DOPP), bis(ethylhexyl)sebacate (DOS) dioctyl phthalate (DOP), 2-nitrophenyloctylether (o-NPOE) and didecylphthalate (DDP) as plasticizing solvent mediators are prepared and constructed for the determination of Zn(II). Of the 15 membranes constructed, only the PVC based membranes of DB18C6 and 18C6 ionophores with DOPP, as plasticizer, in the ratio (w/w) PVC:ionophore:DOPP (60:2:120) give the best results in terms of working concentration range (1.0 × 10−5–1.0 × 10−1 M) with a Nernstian slope of 29.0 mV/decade of activity for membrane composed of DOPP + DB18C6(1a) and (1.0 × 10−5–1.0 × 10−1 M) with a Nernstian slope of 30.0 mV/decade of activity for membrane composed of DOPP + 18C6(1b). The usable pH range of the sensors is 3.0–8.0, beyond which a drift in potential is observed. The response time of the sensors is ⩽15 s with a lifetime of 2 months during which they can be used without any measurable divergence. The selectivity coefficient values indicate that the electrode is highly selective for Zn2+ over a number of other cations except Pb2+ and Ag+. The electrodes have successfully been used to determine Zn(II) in real alloys and standard samples with a precision as relative standard deviation (RSD) <2% for each of the cited electrodes. The results obtained by the proposed ISEs are in good agreement with the results obtained by direct flame AAS method.http://www.sciencedirect.com/science/article/pii/S1878535211002504Crown ethersZincIon selective electrodesCalix-[6]areneAlloys |
| spellingShingle | Magda A. Akl Mohammed H. Abd El-Aziz Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors Arabian Journal of Chemistry Crown ethers Zinc Ion selective electrodes Calix-[6]arene Alloys |
| title | Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors |
| title_full | Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors |
| title_fullStr | Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors |
| title_full_unstemmed | Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors |
| title_short | Polyvinyl chloride-based 18-crown-6, dibenzo18-crown-6 and calix-[6]-arene zinc(II)-potentiometric sensors |
| title_sort | polyvinyl chloride based 18 crown 6 dibenzo18 crown 6 and calix 6 arene zinc ii potentiometric sensors |
| topic | Crown ethers Zinc Ion selective electrodes Calix-[6]arene Alloys |
| url | http://www.sciencedirect.com/science/article/pii/S1878535211002504 |
| work_keys_str_mv | AT magdaaakl polyvinylchloridebased18crown6dibenzo18crown6andcalix6arenezinciipotentiometricsensors AT mohammedhabdelaziz polyvinylchloridebased18crown6dibenzo18crown6andcalix6arenezinciipotentiometricsensors |