caa a22 4500 445880694 CHVBK 20180317145542.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s00604-011-0564-9 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0564-9 Supramolecular-based dispersive liquid-liquid microextraction: A novel sample preparation technique for determination of inorganic species [Elektronische Daten] [Sanaz Jafarvand, Farzaneh Shemirani] A new simple and sensitive method has been developed for the determination of trace levels of inorganic species in environmental water samples. It is based on the use of supramolecular-based dispersive liquid-liquid microextraction (SM-DLLME) prior to microsample introduction into FAAS. The ions are micro-extracted with coacervates composed of reverse micelles made from decanoic acid and dispersed in tetrahydrofuran-water mixtures. Cobalt ion was used as a model ion, and 1- (2-pyridylazo)-2-naphthol as the complexing agent. SM-DLLME results from a combination of DLLME with coacervation-based microextraction. It combines the advantages of DLLME with those of preconcentration based on coacervation and reverse micelles. Factors affecting the extraction efficiency of Co and its subsequent determination by FAAS were optimized. Under the optimized conditions and using 5.00mL sample only, the enhancement factor is 58, the limit of detection is 4.2μg L-1, and the relative standard deviations for 100μg L-1 and 30μg L-1 of Co are 2.1% and 3.8%, respectively (n = 6). The accuracy of the method was confirmed by parallel analyses using the ASTM reference method. Schematic representation SM-DLLME enrichment method (Supramolecular assemblies were hired as extraction media in dispersive liquid-liquid microextraction. This method is based on microextraction of analytes with coacervates made up of decanoic acid reverse micelles dispersed in tetrahydrofuran (THF)-water. Hazardous organic solvents as the microextraction solvent were avoided) Springer-Verlag, 2011 Supramolecular-based dispersive liquid-liquid microextraction (SM-DLLME) nationallicence Coacervates nationallicence Flame atomic absorption spectrometry nationallicence Microsample introduction nationallicence Reverse micelles nationallicence Cobalt nationallicence Jafarvand Sanaz Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran aut Shemirani Farzaneh Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran aut Microchimica Acta Springer Vienna 173/3-4(2011-06-01), 353-359 0026-3672 173:3-4<353 2011 173 604 https://doi.org/10.1007/s00604-011-0564-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0564-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jafarvand Sanaz Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran aut NATIONALLICENCE 700 1- Shemirani Farzaneh Department of Analytical Chemistry, Faculty of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 173/3-4(2011-06-01), 353-359 0026-3672 173:3-4<353 2011 173 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer