RT journal article
T1 A liquid micro-extraction based one-step method for the chemical fractionation of copper in seawater
A1 Belbachir, Ibtissem
A1 López López, José Antonio
A1 Herce Sesa, Belén
A1 Moreno Aguilar, Carlos
A2 Química Analítica
K1 Copper
K1 Fractionation
K1 Liquid phase micro-extraction
K1 Seawater
K1 Metals
AB In this work, the reagent Cyanex® 272 has been incorporated in a three-phase solvent bar micro-extraction system to selectively separate the inorganic and organic fractions of copper in seawater. Optimized conditions for micro-extraction of Cu fractions were 0.2 M Cyanex® 272 in the organic solution contained into the fiber pores, 0.5 M HCl as acceptor solution within the fiber, stirring rate of 500 rpm, and 60 min time of extraction, providing an enrichment factor of 51.6 ± 2.3. Experimental results for selective extraction of organic and inorganic Cu showed a good correlation with theoretical data for Cu speciation, and the relationship between enrichment factor and dissolved organic carbon (DOC) concentration in the samples was used to predict total Cu concentration. Instrumental determination of Cu presented a linear response within the range 0.1–20 µg L−1, obtaining a limit of detection of 0.03 µg L−1. Finally, the method was successfully applied to the study of Cu fractions in real seawater samples collected from the Bay of Cádiz (Spain). © 2022 The Authors
PB ELSEVIER
SN 0304-3894
YR 2022
FD 2022-05
LK http://hdl.handle.net/10498/26371
UL http://hdl.handle.net/10498/26371
LA eng
NO The authors want to acknowledge the Spanish Ministry of Science and Innovation for the financial support of the project PGC2018-101894-B-I00 the FPU grant FPU15/03924 , and the ERASMUS + program for the grant received by Ibstissem Belbachir, which allowed her research stay at the University of Cádiz.
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026