Health Research Registry List

Research Registry No : HRID-00347_V7
University Departmental Research :
Registration Date : 2019-05-21
Title of Research : Detection of plasticizer content in different PET (polyethylene terephthalate) drinking water bottles
Principle Investigator : Ei Ei Htway
Co-authors : Myint Myint Khaing, Aye Thida Htun, May Thandar Htun, Thiri Hlaing, Rai Kit, Khin May Thi, Win Aung
Field of Research : Chemistry
Publication Source :
Year of Publication : -
URL of Publication : -
Presentation Source : 47th Myanmar Health Research Congress, 2019; p99
Placement of Presentation : Department of Medical Research
Year of Presentation : 2019
Abstract : Polyethylene terephthalate (PET) polymer is a type of widely used thermoplastic polymer for the manufacture of food contact packaging, especially for beverages and drinking water. The hazardous substances in the food packaging polymers are still in question among the consumers. The aims of the study was to detect the plasticizer content in the PET bottles which were used in the storage of drinking water and to determine the migration of some plasticizers from PET polymer to drinking water qualitatively. In this study, a total of sealed 10 drinking water bottles (1 litre capacity) in different brands were analyzed for plasticizer content in PET bottles and plasticizer content in PET bottled water from randomly selected 5 brands. All of the samples were collected from Mandalay Region. The type of the polymer of the samples was confirmed by Fourier Transform Infra-Red Spectrophotometer (FT-IR). The plasticizers and other extractable matters were extracted with chloroform by using reflux extraction method from the confirmed polymer samples and liquid-liquid extraction method from the bottled water. The separation of plasticizers and related compounds from the PET polymer and bottled water was carried out by the Gas Chromatography- Mass Spectrometry (GC-MS) with DB-5 column in the scan mode of electron ionization (EI) method. The separated compounds were identified by National Institute of Standard and Technology (NIST) libraries of that machine. The identified compounds from the PET polymer were isomeric forms of xylene, aliphatic ester, aromatic ester, glycol derivatives, naphthalenic compound and some other benzene related compounds. In addition, xylene, aliphatic esters, glycol derivatives and aromatic diol were identified from the bottled water. Xylene (m/z= 91.05) which was used for the depolymerisation of PET in the recycling process was abundantly detected in the PET bottles as well as bottled water. The regulated maximum contaminants level (EPA & FDA, US) of xylene in bottled water is 10 ppm. According to migration percent and relative percent in GC chromatogram, the relative abundance of xylene content in PET polymer was ranging from 7.5% to 76.99 % and the esimated amount was 0.0585 ppm-0.6005 ppm. This study show the PET polymer found to be contained different kinds of plasticizer and other industrial residues. Among them xylene was more ability to migrate into the bottled water than other compounds. It was concluded that the content of plasticizers and the chemicals used in the recycling process of PET drinking water bottles could be a health hazards to consumers.
IRB/PRC/ERC Approval Date : 2015-12-29
Placement of IRB/PRC/ERC : DMP(POLB)
IRB/PRC/ERC Approval Letter/Document : PET, Dept.docx
Pre-existing Registration ID : -
Pre-existing Name of Organization : -
Pre-existing Website : -