RT Journal Article
T1 Development of a cloud point extraction method combined with ETAAS and ICP‑MS for the preconcentration and quantification of silver as nanoparticles in saline samples
A1 Barciela Alonso, María Carmen
A1 Peña Vázquez, Elena María
A1 López Mayán, Juan José
A1 Rodríguez Arnoso, Óscar
A1 Bermejo Barrera, Pilar
K1 Cloud point extraction
K1 Silver nanoparticles
K1 ETAAS
K1 SP-ICP-MS
K1 Seawater analysis
AB The increasing industrial use of silver nanoparticles (AgNPs) has led to interest in their determination in different types of environmental complex samples, including saline matrices such as aquaculture waters. A simple, reliable, and green analytical method using instrumentation available in most of the laboratories has been developed for the determination of silver as nanoparticles in saline samples. Cloud point extraction (CPE) was used for the separation of AgNPs from seawater, and silver was then determined in the surfactant-rich extracts by electrothermal atomic absorption spectrometry (ETAAS). Parameters related to ETAAS and the cloud point extraction procedure (Triton X-114 concentration, volume of complexing agent (EDTA), pH and type of buffer, effect of repetitive extraction, matrix modifier, etc) were evaluated. A concentration of Triton X-114 of 12% (v/v), a volume of 750 μL of saturated EDTA, and a pH of 7.0 were selected as the optimum conditions for the separation of AgNPs. Standard addition calibration solutions in a concentration range from 0 to 3.0 μg L−1 of AgNPs were subjected to the CPE procedure and used for silver determination by ETAAS. The LOD and LOQ were 0.038 and 0.125 μg L−1 of silver (as AgNPs), respectively. The method is precise (whole procedure 9.7%) and accurate (recovery percentages 99±4%), showing a good selectivity for the extraction of AgNPs, while ionic Ag remains in the aqueous phase. Moreover, the results of size analysis of the nanoparticles in the surfactant extracts of seawater samples spiked with AgNPs (40 and 60 nm) by SP-ICP-MS and TEM were in good agreement.
PB Springer
SN 0026-3672
YR 2025
FD 2025
LK https://hdl.handle.net/10347/43106
UL https://hdl.handle.net/10347/43106
LA eng
NO Barciela-Alonso, M. C., Peña-Vázquez, E., López-Mayán, J. J., Rodríguez-Arnoso, Ó., Bermejo-Barrera, P. (2025). Development of a cloud point extraction method combined with ETAAS and ICP-MS for the preconcentration and quantification of silver as nanoparticles in saline samples. "Microchimica Acta", vol. 192
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. The authors wish to thank the financial support of Ministerio de Economía y Competitividad (project INNOVANANO, reference RT2018-099222-B-100), and Xunta de Galicia (Grupo de Referencia Competitiva, grant number ED431C_2022/29)
DS Minerva
RD 23 abr 2026