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The Effect of Storage Time, Temperature and Type of Packaging on the Release of Phthalate Esters into Packed Acidic Liquids


Noushin Rastkari1,2*orcid tiny, Maryam Zare Jeddi2orcid tiny, Masud Yunesian3orcid tiny and Reza Ahmadkhaniha4orcid tiny

 

1Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
2Center for Air Pollution Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
3Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4Department of Human Ecology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran


Article history:
Received: December 26, 2016
Accepted: August 25, 2017



Key words:
phthalate esters, migration, storage condition, polyethylene terephthalate (PET), high-density polyethylene (HDPE)


Summary:
Acidic liquids such as verjuice, lemon juice and vinegar are frequently consumed in Iran. Different kinds of acidic liquids are packaged in polyethylene terephthalate (PET) and high-density polyethylene (HDPE) bottles. There is evidence indicating that phthalates can leach from PET and HDPE bottles into their contents. In this work the effect of storage time, temperature and bottle type on the migration of phthalates from packaging materials into acidic liquids is studied by analyzing the samples stored under different conditions, before storage and after 2, 4 and 6 months of storage. The determined mean phthalate concentrations in μg/L were: <0.04 to 0.501 in verjuice, <0.04 to 0.231 in lemon juice and <0.04 to 0.586 in vinegar. The highest concentrations of diethyl phthalate (DEP) and diethyl hexyl phthalate (DEHP) were found in PET and HDPE bottles, respectively. Results of analyses before and after storage indicate that under some storage conditions, the concentrations of DEP, DEHP and dibutyl phthalate (DBP) increased in acidic liquids. The  possible migration of phthalic acid esters from plastic packaging materials into the contents was indicated by the results of the present study.



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