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Determination of Diethylhexyladipate and Acetyltributylcitrate in Aqueous Extracts After Cloud Point Extraction Coupled with Microwave Assisted Back Extraction and Gas Chromatographic Separation by Panagiota D. Zygoura; Evangelos K. Paleologos; Kyriakos A. Riganakos; Michael G. Kontominas is a Chemistry article available to read on EtoBox.
What is Determination of Diethylhexyladipate and Acetyltributylcitrate in Aqueous Extracts After Cloud Point Extraction Coupled with Microwave Assisted Back Extraction and Gas Chromatographic Separation about?
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 g/L for each analyte while the detection limits were as low as 15 and 19 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.
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- Author
- Panagiota D. Zygoura; Evangelos K. Paleologos; Kyriakos A. Riganakos; Michael G. Kontominas
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)
- Published
- 2005
- Language
- EN
- Field
- Chemistry (Physical Sciences)