(2009) Comparative evaluation of Dy(III) selective poly(vinyl) chloride based membrane electrodes of macrocyclic tetraimine Schiff’s bases. Talanta.
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Abstract
Three different derivatives of macrocyclic tetraimine Schiff’s base have been synthesized and explored as a neutral ionophores for preparing poly(vinyl chloride) based membrane sensors selective to Dy3+. The addition of sodium tetraphenyl borate and various plasticizers, viz., o-NPOE, DBP, DBBP, DOP and CN has been found to substantially improve the performance of the sensors. The best performance was obtained with the sensor no. 1 having membrane of Schiff’s base (SL-1) with composition (w/w) SL-1 (4.5%): PVC (30.5%): o-NPOE (59.5%): NaTPB (5.5%). This sensor exhibits Nernstian response with slope 19.4 mV/decade of activity in the concentration range of 10−8 to 1.0×10−2M Dy3+, performs satisfactorily over wide pH range of (2.8–7.2) with a fast response time (10 s). The sensor was also found to work satisfactorily in partially non-aqueous media up to 20% (v/v) content of acetonitrile, methanol or ethanol. The proposed sensor can be used over a period of 1.5 months without significant drift in potentials. The sensor has been also utilized for the determination of Dy3+ level in different soil samples.
| Item Type: | Article |
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| Subjects: | Chemistry |
| Department: | College of Chemicals and Materials > Chemistry |
| Depositing User: | Users 4454 not found. |
| Date Deposited: | 18 Oct 2009 17:22 |
| Last Modified: | 01 Nov 2019 14:11 |
| URI: | http://eprints.kfupm.edu.sa/id/eprint/136169 |