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Adsorption Effects in Polarography of Berberine

Šebojka Komorsky-Lovrić ; Faculty of Pharmacy and Biochemistry, University of Zagreb, 41000 Zagreb, Yugoslavia
Zvonimir Gašparec ; Faculty of Pharmacy and Biochemistry, University of Zagreb, 41000 Zagreb, Yugoslavia
Marko Branica ; Center for Marine Research Zagreb, »Rudjer Bošković" Institute, POB. 1016, Zagreb 41001, Yugoslavia

Puni tekst: engleski, pdf (6 MB) str. 635-648 preuzimanja: 110* citiraj
APA 6th Edition
Komorsky-Lovrić, Š., Gašparec, Z. i Branica, M. (1987). Adsorption Effects in Polarography of Berberine. Croatica Chemica Acta, 60 (4), 635-648. Preuzeto s https://hrcak.srce.hr/176390
MLA 8th Edition
Komorsky-Lovrić, Šebojka, et al. "Adsorption Effects in Polarography of Berberine." Croatica Chemica Acta, vol. 60, br. 4, 1987, str. 635-648. https://hrcak.srce.hr/176390. Citirano 05.03.2021.
Chicago 17th Edition
Komorsky-Lovrić, Šebojka, Zvonimir Gašparec i Marko Branica. "Adsorption Effects in Polarography of Berberine." Croatica Chemica Acta 60, br. 4 (1987): 635-648. https://hrcak.srce.hr/176390
Harvard
Komorsky-Lovrić, Š., Gašparec, Z., i Branica, M. (1987). 'Adsorption Effects in Polarography of Berberine', Croatica Chemica Acta, 60(4), str. 635-648. Preuzeto s: https://hrcak.srce.hr/176390 (Datum pristupa: 05.03.2021.)
Vancouver
Komorsky-Lovrić Š, Gašparec Z, Branica M. Adsorption Effects in Polarography of Berberine. Croatica Chemica Acta [Internet]. 1987 [pristupljeno 05.03.2021.];60(4):635-648. Dostupno na: https://hrcak.srce.hr/176390
IEEE
Š. Komorsky-Lovrić, Z. Gašparec i M. Branica, "Adsorption Effects in Polarography of Berberine", Croatica Chemica Acta, vol.60, br. 4, str. 635-648, 1987. [Online]. Dostupno na: https://hrcak.srce.hr/176390. [Citirano: 05.03.2021.]

Sažetak
Adsorption effects in square-wave and d. c. polarography of
berberine are investigated in the supporting electrolytes of various
pH. Tensametric a. c. and SW polarographic measurements show
that both berberine and canadine are strongly adsorbed in the
potential range between -0.3 V and --'1.7 V vs. SCE. The reduction
of berberine proceeds from the adsorbed state and requires four
electrons. The coefficients ana = 1.32 and D = (4.0 ± 0.5) . 10-6 cm2/s are evaluated. There are two kind of faradaic SW responses: the first is associated with very low surface coverage while the second
appears when the surface is totally covered by the adsorbed berberine. In d. c. polarography a pseudo-prewave and pseudo-
-main wave appear.·If pH > 6 the limiting currents of d. c. polarographic waves are severely depressed.

Hrčak ID: 176390

URI
https://hrcak.srce.hr/176390

Posjeta: 206 *