Abstract

Phthalate esters are organic compounds that are extensively used in polymers manufacturing and many commercial products and can induce serious adverse health effects upon human exposure. The migration of phthalates esters from PET plastic bottles into water especially under poor storage conditions is subject to scientific debate. This study is the first to assess the occurrence of six phthalates in different branded PET bottled water locally produced in the Egyptian market. The samples were analyzed using liquid-liquid extraction with dichloromethane and GC/MS under various storage conditions. Among the six analyzed phthalates, three were detected at sub ppb levels where DEHP was the dominant phthalate followed by DBP. The data suggests that time and temperature correlate with the increase of phthalates migration. The levels of phthalates detected in all samples were significantly below the maximum contaminant limits established by the FDA and the EPA. Throughout the study, the concentration range of DEHP varied from <0.062 µg l-1 and reached a maximum concentration of 0.617 µg l-1, while for DBP the concentration ranged from <0.043 µg l-1 to a maximum concentration of 0.549 µg l-1. DEP was also detected but in very small concentration values, such that the highest recorded concentration for DEP over the whole study was 0.062 µg l-1. The estimated daily intakes to phthalates via bottled water were calculated from the measured phthalates concentrations and were reported to be considerably lower than their respective tolerable daily intake values established by EFSA. The contribution of water to phthalates daily intakes did not exceed 0.16% and 0.72 % of the TDI values for DBP while these values were 0.04% and 0.16% for DEHP in adults and toddlers, respectively

Department

Chemistry Department

Degree Name

MS in Chemistry

Date of Award

6-1-2015

Online Submission Date

June 2015

First Advisor

Shoeib, Tamer

Committee Member 1

Elgendy, Nour Shafik

Committee Member 2

Elgendy, Ahmed Shafik

Document Type

Thesis

Extent

84 p.

Library of Congress Subject Heading 1

Phthalate esters.

Library of Congress Subject Heading 2

Polyethylene terephthalate.

Rights

The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy.

IRB

Not necessary for this item

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