Abstract：
:A method for selecting a usable carbon-fiber electrode using the equivalent resistance and capacitance is presented. This method uses an instrument with a PC-based look-up table for measuring the electrical characteristics of a carbon-fiber electrode in pulse voltammetry. Using this instrument, the equivalent resistance and capacitance of the carbon-fiber electrode in saturated sodium chloride solution can be obtained. This instrument includes a decade resistance box, a peak current detection and hold circuit, a half peak comparator and a decay duration counter. A look-up table is established by using RC circuits to emulate the electrochemical reaction of the carbon-fiber electrode in pulse voltammetry. The equivalent resistance is obtained from the decade resistance box according to Kirchhoff's law. Then the equivalent capacitance is determined from the decay duration counter reading and equivalent resistance with the look-up table via a PC interpolation program. After obtaining the equivalent resistance and capacitance of an electrode, the values are compared with the usable thresholds. This method provides an effective quality evaluation index of carbon-fiber electrode for the user in order to reduce electrode-induced experimental failure. The method is also available for other kinds of carbon-fiber electrodes as long as their look-up table and desired thresholds are established.
journal_name
J Neurosci Methodsjournal_title
Journal of neuroscience methodsauthors
Liao BY,Lio HP,Wang CY,Young MS,Ho MT,Lin MTdoi
10.1016/0165-0270(93)90036-qsubject
Has Abstractpub_date
1993-12-01 00:00:00pages
291-9issue
3eissn
0165-0270issn
1872-678Xpii
0165-0270(93)90036-Qjournal_volume
50pub_type
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journal_title：Journal of neuroscience methods
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