Study on Hydrogen Ion-Selective Solid Contact Electrodes Based on Decamethylcyclopentasiloxane

Hydrogen ion-selective solid contact electrode based on decamethylcyclopentasiloxane (DMCS) as ionophore was fabricated. The membrane solution was prepared by mixing DMCS, polyvinyl chloride (PVC), potassium tetrakis p-chlorophenyl borate (KTpClPB) and various plasticizers. The best performance was...

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Bibliographic Details
Published in:Analytical letters 2011-08, Vol.44 (12), p.2138-2149
Main Authors: Kim, Boram, Shim, Jihye, Chung, Koo-Chun
Format: Article
Language:English
Subjects:
Analytical chemistry
Bulk molding compounds
Chemistry
Conducting polymer
Conducting polymers
Contact
Decamethylcyclopentasiloxane
Electrochemical methods
Electrodes
Ethers
Exact sciences and technology
General, instrumentation
Hydrogen ion sensor
ISE
Mathematical analysis
Polyvinyl chlorides
SCE
Titration
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Summary:Hydrogen ion-selective solid contact electrode based on decamethylcyclopentasiloxane (DMCS) as ionophore was fabricated. The membrane solution was prepared by mixing DMCS, polyvinyl chloride (PVC), potassium tetrakis p-chlorophenyl borate (KTpClPB) and various plasticizers. The best performance was obtained with the sensor based on NPOE (o-nitrophenyl octyl ether) and the conducting polymer layer of poly(pyrrole), doped with NaClO 4 . The electrode exhibited Nernstian-response in the range of pH 1.9-9.8 with a slope of 57.6 ± 0.2 mV per decade and fast response time within 15 s. This electrode showed good selectivity and was successfully used as an indicator electrode in the potentiometric titration.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032719.2010.546023