Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode
The PVC membrane of an ion-selective electrode (ISE) sensitive to dibasic phosphate ions (HPO4-ISE) has not been optimized for maximum selectivity, sensitivity, and useable ISE lifetime and further work was necessary to improve its performance. Two areas of investigation are reported here: include t...
Main Author: | |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2015-12-01
|
Series: | Chemosensors |
Subjects: | |
Online Access: | http://www.mdpi.com/2227-9040/3/4/284 |
id |
doaj-9a289f0f542a415d83cfac7f522a09fd |
---|---|
record_format |
Article |
spelling |
doaj-9a289f0f542a415d83cfac7f522a09fd2020-11-24T20:54:50ZengMDPI AGChemosensors2227-90402015-12-013428429410.3390/chemosensors3040284chemosensors3040284Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective ElectrodeClifton Carey0Department of Craniofacial Biology, School of Dental Medicine, University of Colorado, 12800 E. 19th Avenue, MS 8310, Aurora, CO 80206, USAThe PVC membrane of an ion-selective electrode (ISE) sensitive to dibasic phosphate ions (HPO4-ISE) has not been optimized for maximum selectivity, sensitivity, and useable ISE lifetime and further work was necessary to improve its performance. Two areas of investigation are reported here: include the parameters for the lipophilicity of the plasticizer compound used and the amount of cyclic polyamine ionophore incorporated in the PVC membrane. Six candidate plasticizers with a range of lipophilicity were evaluated for their effect on the useable lifetime, sensitivity, and selectivity of the ISE against 13 different anions. Selectivity was determined by a modified fixed interferent method, sensitivity was determined without interferents, and the usable lifetime evaluated at the elapsed time where 50% of the HPO4-ISE failed (L50). The results show that choosing a plasticizer that has a lipophilicity similar to the ionophore’s results in the best selectivity and sensitivity and the longest L50.http://www.mdpi.com/2227-9040/3/4/284ion-selective electrodechemical sensorphosphateplasticizerlipophilicityliquid membranesensitivityselectivity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Clifton Carey |
spellingShingle |
Clifton Carey Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode Chemosensors ion-selective electrode chemical sensor phosphate plasticizer lipophilicity liquid membrane sensitivity selectivity |
author_facet |
Clifton Carey |
author_sort |
Clifton Carey |
title |
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode |
title_short |
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode |
title_full |
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode |
title_fullStr |
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode |
title_full_unstemmed |
Plasticizer Effects in the PVC Membrane of the Dibasic Phosphate Selective Electrode |
title_sort |
plasticizer effects in the pvc membrane of the dibasic phosphate selective electrode |
publisher |
MDPI AG |
series |
Chemosensors |
issn |
2227-9040 |
publishDate |
2015-12-01 |
description |
The PVC membrane of an ion-selective electrode (ISE) sensitive to dibasic phosphate ions (HPO4-ISE) has not been optimized for maximum selectivity, sensitivity, and useable ISE lifetime and further work was necessary to improve its performance. Two areas of investigation are reported here: include the parameters for the lipophilicity of the plasticizer compound used and the amount of cyclic polyamine ionophore incorporated in the PVC membrane. Six candidate plasticizers with a range of lipophilicity were evaluated for their effect on the useable lifetime, sensitivity, and selectivity of the ISE against 13 different anions. Selectivity was determined by a modified fixed interferent method, sensitivity was determined without interferents, and the usable lifetime evaluated at the elapsed time where 50% of the HPO4-ISE failed (L50). The results show that choosing a plasticizer that has a lipophilicity similar to the ionophore’s results in the best selectivity and sensitivity and the longest L50. |
topic |
ion-selective electrode chemical sensor phosphate plasticizer lipophilicity liquid membrane sensitivity selectivity |
url |
http://www.mdpi.com/2227-9040/3/4/284 |
work_keys_str_mv |
AT cliftoncarey plasticizereffectsinthepvcmembraneofthedibasicphosphateselectiveelectrode |
_version_ |
1716793527494508544 |