Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
EN
|
EL
| URI | http://purl.tuc.gr/dl/dias/2C190A94-F49C-4D26-95DA-2151C92E59C8 | - |
| Αναγνωριστικό | https://doi.org/10.1016/j.talanta.2009.11.005 | - |
| Γλώσσα | en | - |
| Μέγεθος | 6 pages | en |
| Τίτλος | Vortex-assisted liquid-liquid microextraction of octylphenol, nonylphenol and bisphenol-A | en |
| Δημιουργός | Elefteria Psillakis | en |
| Δημιουργός | Evangelia Yiantzi | en |
| Δημιουργός | Konstantina Tyrovola | en |
| Δημιουργός | Nicolas Kalogerakis | en |
| Εκδότης | Elsevier | en |
| Περίληψη | A new and fast equilibrium-based solvent microextraction technique termed vortex-assisted liquid–liquid microextraction (VALLME) has been developed and used for the trace analysis of octylphenol, nonylphenol and bisphenol-A in water and wastewater samples. According to VALLME, dispersion of microvolumes of a low density extractant organic solvent into the aqueous sample is achieved by using for the first time vortex mixing, a mild emulsification procedure. The fine droplets formed could extract target analytes towards equilibrium faster because of the shorter diffusion distance and larger specific surface area. Upon centrifugation the floating extractant acceptor phase restored its initial single microdrop shape and was used for high-performance liquid chromatographic analysis. Different experimental parameters were controlled and the optimum conditions found were: 50l of octanol as the extractant phase; 20 ml aqueous donor samples; a 2 min vortex extraction time with the vortex agitator set at a 2500rpm rotational speed; centrifugation for 2 min at 3500 rpm; no ionic strength or pH adjustment. The calculated calibration curves gave high levels of linearity yielding correlation coefficients (r2) greater than 0.9935. The repeatability and reproducibility of the proposed method were found to be good and the limits of the detection were calculated in the low g l−1 level ranging between 0.01 and 0.07g l−1. Matrix effects were determined by applying the proposed method to spiked tap, river water and treated municipal wastewater samples. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2015-09-24 | - |
| Ημερομηνία Δημοσίευσης | 2010 | - |
| Βιβλιογραφική Αναφορά | E. Yiantzi, E. Psillakis , K. Tyrovola, N. Kalogerakis , "Vortex-assisted liquid–liquid microextraction of octylphenol, nonylphenol and bisphenol-A " ,Tal.,vol. 80,no.5 ,pp.2057–2062,2010.doi:10.1016/j.talanta.2009.11.005 | en |
Copyright © DIAS 2013
