New Cadmium(II)-Selective Electrode Based on a Tetraazacyclohexadeca Macrocyclic Ionophore
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Accession number;05A0184739
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| Title;New Cadmium(II)-Selective Electrode Based on a Tetraazacyclohexadeca Macrocyclic Ionophore |
| Author;
SINGH A K
(Indian Inst. Of Technol.-roorkee, Roorkee, Ind)
SAXENA P
(Indian Inst. Of Technol.-roorkee, Roorkee, Ind)
SINGH R
(Indian Inst. Of Technol.-roorkee, Roorkee, Ind)
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Journal Title;Anal Sci
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Journal Code:G0673B
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ISSN:0910-6340
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VOL.21;NO.2;PAGE.179-181(2005)
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| Figure&Table&Reference;FIG.2, TBL.2, REF.13 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A poly(vinyl chloride)-based membrane of 3,4:11,12-dibenzo-1,6,9,14-tetraazacyclohexadecane with sodium tetraphenyl borate (NaTPB) as an anion excluder and dibutylphthalate (DBP), dibutyl(butyl)phosphonate (DBBP), tris(2-ethylhexyl)phosphate (TEHP) and tributyl phosphate (TBP) as a plasticizing solvent mediator was prepared and investigated as a Cd2+-selective electrode. The best performance was observed with the membrane having a ligand-PVC-DBP-NaTPB composition of 2:25:60:1, which worked well over a wide concentration range (1.6 * 10-6-1.0 * 10-1 M) with a Nernstian slope of 29.5 mV per decade of activity between pH 2.0-6.0. This electrode showed a fast response time of 13 s and was used over a period of 4 months with good reproducibility (S = 0.4 mV). The selectivity coefficient for mono-, di- and trivalent cations indicated excellent selectivity for Cd2+ ions over a large number of cations. Anions such as NO3- and SO42-, did not interfere. The membrane sensor has been successfully used to determine Cd2+ in real samples. (author abst.) |
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