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A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters

Marta Plavšić ; Ruđer Bošković Institute, P.O.B. 1016, 10001 Zagreb, Croatia
Xiankun Lu ; Ocean University of Qingdao, Qingdao, China
Constant M. G. van den Berg ; Ocean University of Qingdao, Qingdao, China

Puni tekst: engleski, pdf (18 MB) str. 179-191 preuzimanja: 104* citiraj
APA 6th Edition
Plavšić, M., Lu, X. i van den Berg, C.M.G. (1997). A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters. Croatica Chemica Acta, 70 (1), 179-191. Preuzeto s https://hrcak.srce.hr/135613
MLA 8th Edition
Plavšić, Marta, et al. "A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters." Croatica Chemica Acta, vol. 70, br. 1, 1997, str. 179-191. https://hrcak.srce.hr/135613. Citirano 23.01.2020.
Chicago 17th Edition
Plavšić, Marta, Xiankun Lu i Constant M. G. van den Berg. "A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters." Croatica Chemica Acta 70, br. 1 (1997): 179-191. https://hrcak.srce.hr/135613
Harvard
Plavšić, M., Lu, X., i van den Berg, C.M.G. (1997). 'A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters', Croatica Chemica Acta, 70(1), str. 179-191. Preuzeto s: https://hrcak.srce.hr/135613 (Datum pristupa: 23.01.2020.)
Vancouver
Plavšić M, Lu X, van den Berg CMG. A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters. Croatica Chemica Acta [Internet]. 1997 [pristupljeno 23.01.2020.];70(1):179-191. Dostupno na: https://hrcak.srce.hr/135613
IEEE
M. Plavšić, X. Lu i C.M.G. van den Berg, "A Voltammetric Study of the Reactivity of Folic Acid in Algal Cultures and in Natural Waters", Croatica Chemica Acta, vol.70, br. 1, str. 179-191, 1997. [Online]. Dostupno na: https://hrcak.srce.hr/135613. [Citirano: 23.01.2020.]

Sažetak
Folic acid (FA) can be determined in natural waters by adsorptive cathodic stripping voltammetry. The measurement suffers from interference due to the presence of humic acid (HA) in natural waters. At 2 mg/L of HA, the peak of FA is fully suppressed. It was concluded from non-equilibrium adsorption isotherms that the adsorption of HA and FA is competitive, and that the folic acid is more strongly adsorbed than the HA. Measurements of the reactive folic acid concentration at low levels of HA found no evidence of complexation of folic acid by humic substances analogous with metal ions. The interfering effect of HA was eliminated by passing the sample through a C-18 cartridge. Water samples from marine and freshwater origin revealed the presence of folic acid. Algal culture experiments using marine algae illustrated that the folic acid is taken up by Phaeodactylum but not by Emiliania and Dunaliella; this finding is tentative due to the possibility that bacteria contributed to the uptake since the cultures were not axenic. The results of these experiments suggest that folic acid could be important to certain species of marine microorganisms.

Hrčak ID: 135613

URI
https://hrcak.srce.hr/135613

Posjeta: 201 *