Determination of pH using a polyaniline-coated piezoelectric crystal

A pH sensor was constructed with a polyaniline-coated piezoelectric crystal. Its resonant freqency is a function of pH in the range 2–12. It has a good selectivity, a long life and a wide linear resoponse range. In the present work, polyaniline films were electrochemically deposited onto one of the...

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Bibliographic Details
Published inAnalytica chimica acta Vol. 329; no. 1; pp. 105 - 109
Main Authors Zhou, Xingyao, Cha, Hongying, Yang, Cheng, Zhang, Wuming
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 09.08.1996
Elsevier
Subjects
Analytical chemistry
Chemistry
Exact sciences and technology
General, instrumentation
Polyaniline
Quartz crystals
Sensors
Voltammetry
Voltammetry
Quartz crystals
Sensors
Polyaniline
Water
Response function
Lifetime
Resonance frequency
Preparation
Electrochemical coating
pHmeter
Piezoelectric crystals
Chemical sensor
Tap water
Coatings
Aniline polymer
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Summary:A pH sensor was constructed with a polyaniline-coated piezoelectric crystal. Its resonant freqency is a function of pH in the range 2–12. It has a good selectivity, a long life and a wide linear resoponse range. In the present work, polyaniline films were electrochemically deposited onto one of the two gold surfaces on the quartz crystal by cyclic voltammetry. Some factors that influence the resonant oscillation frequency have been investigated in detail.
ISSN:0003-2670
1873-4324
DOI:10.1016/0003-2670(96)00098-0