Solvent bar micro-extraction with graphite atomic absorption spectrometry for the determination of silver in ocean water
JA López-López, B Herce-Sesa, C Moreno - Talanta, 2016 - Elsevier
JA López-López, B Herce-Sesa, C Moreno
Talanta, 2016•ElsevierMain 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 …
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 …
Abstract
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.
Elsevier
以上显示的是最相近的搜索结果。 查看全部搜索结果