Surfactant-enhanced liquid-liquid microextraction coupled to micro-solid phase extraction onto highly hydrophobic magnetic nanoparticles
Φόρτωση...
Ημερομηνία
Συγγραφείς
Giannoulis, K. M.
Giokas, D. L.
Zhu, Q.
Tsogas, G. Z.
Vlessidis, A. G.
Pan, Q. M.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Springer Verlag (Germany)
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Microchimica Acta
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
We are presenting a simplified alternative method for dispersive liquid-liquid microextraction (DLLME) by resorting to the use of surfactants as emulsifiers and micro solid-phase extraction (mu-SPE). In this combined procedure, DLLME of hydrophobic components is initially accomplished in a mixed micellar/microemulsion extractant phase that is prepared by rapidly mixing a non-ionic surfactant and 1-octanol in aqueous medium. Then, and in contrast to classic DLLME, the extractant phase is collected by highly hydrophobic polysiloxane-coated core-shell Fe2O3@C magnetic nanoparticles. Hence, the sample components are the target analyte in the DLLME which, in turn, becomes the target analyte of the mu-SPE step. This 2-step approach represents a new and simple DLLME procedure that lacks tedious steps such as centrifugation, thawing, or delicate collection of the extractant phase. As a result, the analytical process is accelerated and the volume of the collected phase does not depend on the volume of the extraction solvent. The method was applied to extract cadmium in the form of its pyrrolidine dithiocarbamate chelate from spiked water samples prior to its determination by FAAS. Detection limits were brought down to the low mu g L-1 levels by preconcentrating 10 mL samples with satisfactory recoveries (96.0-108.0 %).
Περιγραφή
Λέξεις-κλειδιά
dispersive liquid-liquid microextraction, highly hydrophobic magnetic nanoparticles, magnetic solid-phase dispersion, metal chelates, cadmium, atomic absorption spectrometry, atomic-absorption-spectrometry, environmental water samples, organic-compounds, drop microextraction, preconcentration, separation, solidification, optimization, lead
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000320862100006
http://download.springer.com/static/pdf/185/art%253A10.1007%252Fs00604-013-0987-6.pdf?auth66=1381994825_160d20c750615f1d0d3f077ae51b6712&ext=.pdf
http://download.springer.com/static/pdf/185/art%253A10.1007%252Fs00604-013-0987-6.pdf?auth66=1381994825_160d20c750615f1d0d3f077ae51b6712&ext=.pdf
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας