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Polarography of Marine Particles: A Model Study

Nadica Ivošević ; Ruđer Bošković Institute, Center for Marine Research, P.O.B. 1016, 10001 Zagreb, Croatia
Vera Žutić ; Ruđer Bošković Institute, Center for Marine Research, P.O.B. 1016, 10001 Zagreb, Croatia

Puni tekst: engleski, pdf (15 MB) str. 167-178 preuzimanja: 124* citiraj
APA 6th Edition
Ivošević, N. i Žutić, V. (1997). Polarography of Marine Particles: A Model Study. Croatica Chemica Acta, 70 (1), 167-178. Preuzeto s https://hrcak.srce.hr/135612
MLA 8th Edition
Ivošević, Nadica i Vera Žutić. "Polarography of Marine Particles: A Model Study." Croatica Chemica Acta, vol. 70, br. 1, 1997, str. 167-178. https://hrcak.srce.hr/135612. Citirano 14.12.2019.
Chicago 17th Edition
Ivošević, Nadica i Vera Žutić. "Polarography of Marine Particles: A Model Study." Croatica Chemica Acta 70, br. 1 (1997): 167-178. https://hrcak.srce.hr/135612
Harvard
Ivošević, N., i Žutić, V. (1997). 'Polarography of Marine Particles: A Model Study', Croatica Chemica Acta, 70(1), str. 167-178. Preuzeto s: https://hrcak.srce.hr/135612 (Datum pristupa: 14.12.2019.)
Vancouver
Ivošević N, Žutić V. Polarography of Marine Particles: A Model Study. Croatica Chemica Acta [Internet]. 1997 [pristupljeno 14.12.2019.];70(1):167-178. Dostupno na: https://hrcak.srce.hr/135612
IEEE
N. Ivošević i V. Žutić, "Polarography of Marine Particles: A Model Study", Croatica Chemica Acta, vol.70, br. 1, str. 167-178, 1997. [Online]. Dostupno na: https://hrcak.srce.hr/135612. [Citirano: 14.12.2019.]

Sažetak
A simple polarographic method for direct measurement of surface active constituents of seawater was used to investigate the effect of variable levels of dissolved surfactants on the detection of attachment signals of surface active particles at the artificial interface.
A mixture of dextran solutions and dispersion of insoluble squalene droplets simulates electrochemical signals in natural samples and allows prediction of the behaviour of natural organic particles.
For the same distribution of particles in the aqueous dispersion, attachment signals frequency decreases exponentially with an increasing bulk concentration of dissolved molecules. Attachment rate of particles at the dropping mercury electrode (DME) depends on the extent of surface coverage with adsorbed molecules (0). At full coverage of the electrode, no particle attachment signals can be detected.
The actual distribution of surface active particles can be determined by direct measurement of attachment signals when 6 < 0.5, which is the case of the majority of seawater samples. For 6 ž 0.5, dilution with organic free electrolyte and/or sampling within the initial part of the DME life-time should be used.

Hrčak ID: 135612

URI
https://hrcak.srce.hr/135612

Posjeta: 188 *