Determination of diethylhexyladipate and acetyltributylcitrate in aqueous extracts after cloud point extraction coupled with microwave assisted back extraction and gas chromatographic separation
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Ημερομηνία
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Chromatography A
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The determination of commercial plasticizers (di-(2-ethylhexyl)adipate (DEHA) and acetyl tributyl citrate (ATBC)) in aqueous solutions is described. The newly proposed technique of applying microwaves to cloud point extracts in order to enable combination with gas chromatographic analysis has been used for this purpose. Both plasticizers were entrapped in the micelles of the non-ionic surfactant Triton X-114 and removed from the bulk phase by centrifugation. Micellization was enhanced by increasing the ionic strength of the solution with concentrated NaCl. Extraction recoveries of the proposed method were over 95% for water and 3% (w/v) aqueous acetic acid and over 85% for 10% (v/v) aqueous ethanol, respectively. The calibration curves obtained, following the proposed methodology have a linear range between 50 and 2000 mu g/L for each analyte while the detection limits were as low as 15 and 19 mu g/L for DEHA and ATBC, respectively, with an RSD below 5% even for low concentrations. As an analytical demonstration the proposed methodology was applied for the determination of the migration levels of the selected plasticizers from a PVC food packaging film into aqueous simulants. (c) 2005 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
cloud point extraction, deha, atbc, microwave back extraction, gas chromatography, solid-phase microextraction, performance liquid-chromatography, preconcentration step prior, phthalic-acid esters, capillary-electrophoresis, organic pollutants, micellar solutions, plasticized pvc, water samples, food
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000232957900004
http://ac.els-cdn.com/S002196730501575X/1-s2.0-S002196730501575X-main.pdf?_tid=bf8c4ad06bd485755c577f83106ac2e3&acdnat=1333037762_430dc6d561ce9c69c9b2a337abe903ed
http://ac.els-cdn.com/S002196730501575X/1-s2.0-S002196730501575X-main.pdf?_tid=bf8c4ad06bd485755c577f83106ac2e3&acdnat=1333037762_430dc6d561ce9c69c9b2a337abe903ed
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