Abstract
In the present work, a novel, simple, and efficient method for the determination of silver in natural water samples was developed. The method is based on the extraction of silver with coacervate made up of decanoic acid reverse micelles and the subsequent determination by flame atomic absorption spectrometry (FAAS). Dithizone was used as a chelating agent. To obtain the best extraction results, some experimental parameters (such as coacervate composition, pH, concentration of chelating agent, and ionic strength) affecting the extraction efficiency were investigated and optimized. Under optimum conditions, the calibration curve was linear in the concentration range of 5-200 µg L-1, with the correlation coefficient (r) equal to 0.995. The limit of detection and the enrichment factor were 1.6 µg L-1 and 15, respectively. The method was successfully applied to the analysis of silver in natural water samples.
Highlights
The widespread use of silver compounds and silvercontaining procedures in industry, medicine, jewelry, cloud seeding, and in the disinfection of drinking water has resulted in an increasing silver content in environmental samples.[1]
Silver is considered to be toxic to humans and the recommendations of the World Health Organization (WHO) permit maximum concentrations of 0.1 mg L-1 of silver ions in drinking water disinfection, but the United States Environmental Protection Agency (USEPA) recommends 0.05 mg L-1 as the maximum.[3]
We investigate the suitability of amphiphilebased coacervative microextraction for the separation of silver ions from water samples prior to flame atomic absorption spectrometry (FAAS) detection
Summary
The widespread use of silver compounds and silvercontaining procedures in industry, medicine, jewelry, cloud seeding, and in the disinfection of drinking water has resulted in an increasing silver content in environmental samples.[1]. Detailed studies on coacervation process of various alkanoic acid reverse micelles in miscible binary mixtures of water and a variety of protic and aprotic solvents and their potential for the extraction have been reported by Ruiz et al.[29] This new separation/preconcentration technique has been used for the extraction of various contaminants such as bisphenols in different matrices,[31,32,33,34] ochratoxin A,35 carcinogenic polycyclic aromatic hydrocarbons[36] prior to their determination by liquid chromatography, and arsenic[37] by electrothermal atomic absorption spectrometry. To the best of our knowledge, there is no previous literature report on the use of supramolecular solvent made up of decanoic acid reversed micelles and FAAS technique for the preconcentration and determination of silver ions in real samples. All glass vessels used for trace analysis were stored in 10% nitric acid for at least 24 h and washed four times with doubly distilled water before use
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
