RT journal article
T1 Solvent bar micro-extraction with graphite atomic absorption spectrometry for the determination of silver in ocean water
A1 López López, José Antonio
A1 Herce Sesa, Belén
A1 Moreno Aguilar, Carlos
A2 Química Analítica
K1 silver
K1 ultra-trace analysis
K1 seawater
K1 ionic liquid
K1 solvent bar micro-extraction
AB Main drawbacks for silver determination in seawater are the effects of samples matrix and that Ag appears in the sub ng L−1. Available methods for sample preparation in Ag analysis are based on solid and liquid extraction using tedious process that increase the cost of analysis and the risk of sample contamination, producing important waste amounts.Solvent bar micro-extraction (SBME) allows the pre-concentration of Ag in a micro-volume of the ionic liquid Aliquat 336® in kerosene solution. For this reason, it is considered as a green alternative to standard methods. The method has been optimized using synthetic seawater samples, offering the highest response for samples at pH=2, using 5% Aliquat 336® dissolved in kerosene containing 5% dodecan-1-ol as acceptor solution and after 1 h stirring at 800 rpm.The method exhibited linearity up to 50 ng L−1, with a limit of detection of 0.09 ng L−1, covering the concentration range of interest for environmental studies. Finally, it was applied for determination of Ag in real seawater samples, and the results were compared with the reference method of liquid-liquid extraction with 1-pyrrolidine-dithiocarbamate and diethylammonium-diethyldithiocarbamate, showing the applicability of ionic liquid based SBME using Aliquat 336® for the simple monitoring of silver ultra-traces in seawater analysis.
PB Elsevier
SN 0039-9140
YR 2016
FD 2016
LK http://hdl.handle.net/10498/32456
UL http://hdl.handle.net/10498/32456
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026