A Critical Study of the Effect of Polymeric Fibers on the Performance of Supported Liquid Membranes in Sample Microextraction for Metals Analysis
| Autor: | Carlos Moreno, Rafael Jesús González-Álvarez, José A. López-López, Juan J. Pinto |
|---|---|
| Přispěvatelé: | Química Analítica |
| Rok vydání: | 2020 |
| Předmět: |
Pore size
Materials science Sulfide liquid microextraction metals Filtration and Separation 02 engineering and technology lcsh:Chemical technology 01 natural sciences Article Metal preconcentration Chemical Engineering (miscellaneous) lcsh:TP1-1185 silver Fiber lcsh:Chemical engineering Porosity Hollow fiber supported liquid membrane (HF-SLM) hollow fiber liquid-phase microextraction (HF-LPME) liquid microextraction chemistry.chemical_classification Process Chemistry and Technology 010401 analytical chemistry Extraction (chemistry) lcsh:TP155-156 hollow fiber supported liquid membrane (HF-SLM) hollow fiber liquid-phase microextraction (HF-LPME) 021001 nanoscience & nanotechnology 0104 chemical sciences Membrane chemistry Chemical engineering speciation visual_art visual_art.visual_art_medium 0210 nano-technology Selectivity |
| Zdroj: | Membranes 2020, 10(10), 275 RODIN: Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz Universidad de Cádiz RODIN. Repositorio de Objetos de Docencia e Investigación de la Universidad de Cádiz instname Membranes Membranes, Vol 10, Iss 275, p 275 (2020) Volume 10 Issue 10 |
| Popis: | Popularity of hollow fiber-supported liquid membranes (HF-SLM) for liquid-phase microextraction (HF-LPME) has increased in the last decades. In particular, HF-SLM are applied for sample treatment in the determination and speciation of metals. Up to the date, optimization of preconcentration systems has been focused on chemical conditions. However, criteria about fiber selection are not reflected in published works. HFs differ in pore size, porosity, wall thickness, etc., which can affect efficiency and/or selectivity of chemical systems in extraction of metals. In this work, Ag+ transport using tri-isobutylphosphine sulfide (TIBPS) has been used as a model to evaluate differences in metal transport due to the properties of three different fibers. Accurel PP 50/280 fibers, with a higher effective surface and smaller wall thickness, showed the highest efficiency for metal transport. Accurel PP Q3/2 exhibited intermediate efficiency but easier handling and, finally, Accurel PP S6/2 fibers, with a higher wall thickness, offered poorer efficiency but the highest stability and capability for metal speciation. Summarizing, selection of the polymeric support of HF-SLM is a key factor in their applicability of LPME for metals in natural waters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|