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Reference type: Book Chapter
Authors: Cabanilla S, Ebarvia BS, Sevilla F
Publication date: 2003
Chapter title: Piezoelectric biomimetic sensor for caffeine based on electrosynthesized polypyrrole.
Page numbers: 105-109.
Alternative URL: http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=27500

Book title: Sensors: Asiasense 2003 - Asian Conference On Sensors
Editors: Ahmad M, Heng LY, Salimon J, Ghodgaonkar DK, Yousof RW, Surif S, Taib MN
Publisher: IEEE
City: New York
Series title: IEEE Conference Proceedings

Abstract: This study explored the viability of molecularly-imprinted polypyrrole as die recognition element in a piezoelectric sensor for caffeine. The polymer was prepared by galvanostatic electro-polymerization of pyrrole onto one of the gold electrodes of a quartz crystal in the presence of a template caffeine molecule. The sensor was set in a measuring cell and connected to an instrumentation system consisting of a Pierce oscillator circuit and a frequency counter. The sensor exhibited a linear response in the range of 0.1 to 10 mg ml(-1) (r = 0.9882), a sensitivity of about 255 Hz/ In conc (mg/mL) and good repeatablility, rsd = 8.217 (n=6) for 0.5 mg/mL caffeine solution. This sensor can be a promising inexpensive alternative method for caffeine detection

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