Papers by Orlando Fatibello-filho
Fresenius' journal of analytical chemistry, 2000
The construction and the application of a silica gel based carbon-epoxy indicator electrode for t... more The construction and the application of a silica gel based carbon-epoxy indicator electrode for the potentiometric determination of acids and bases are described. The effect of composition of silica gel and carbon-epoxy, slope (mV/pH), linear response (pH range) and the use for acid-base titrations were investigated. The data obtained for the acid-base titrations were compared with those obtained using a glass electrode in the same conditions. The electrode showed a linear response in the pH 2 to 13 range with a slope of -40.5 +/- 0.4 mV/pH (at 25 degrees C) and a response time of less than 15 s. The lifetime of the electrode was higher than one year (over 6000 determinations) with a decrease of only 5% of the initial potentiometric response. The silica gel based carbon-epoxy electrode showed excellent results in the end-point indication potentiometric titrations in determination of acids and bases. The miniaturization of the proposed electrode for flow injection analysis was invest...
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ACS Applied Materials & Interfaces, 2014
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Aboul-Enein, HY, 2333 Antonelli, ML, 2347 Atanasov, P., 2289 Atkopar, Z., 2383 Bergold, AM, 2377
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Papers by Orlando Fatibello-filho