Myanmar Health Sciences Research Journal
Volume 28, Number 2
TITLE: Chemical Analysis of Drinking Water Bottles
AUTHOR: Ei Ei Htway, Wai Mi Aung, Hla Myoe Min, May Thandar Htun, Kyaw Min Aung, Thiri Hlaing, Khin May Thi, Swe Swe & Yi Yi Myint
SOURCE: Myanmar Health Sciences Research Journal
ABSTRACT: The consumption of bottled water is widely spread in Myanmar and, therefore, it is vital important to know the safety and harmful effect of them. The sealed water bottles are made from various types of polymer such as polyethylene terephthalate (PETE) and plasticized polyvinyl chloride (PVC). These polymers may be contaminated with some elements. So, this research studied with the aim of identification of polymers and trace elements qualitatively. Types of polymers applied in drinking water bottles were identified by using Fourier Transform Infra-red Spectrophotometer (FTIR). Wavelength Dispersive X-ray Fluorescence (WDXRF) was used to detect the elements contained in the drinking water bottles by direct sample measurements. From this study, PETE was observed as type of polymer in all of the selected samples (five brands in Mandalay Region). According to the agriculture and trade policy, PETE polymer is safe for use in food packaging and drinking water. In elemental analysis study, Na, Al, Si, Cl, K, and Fe were detected in all selected samples. Some other elements (Ca, P, S, Cr, Ti, Rh, Pb, I, Cu, Zn, Mn, Ag, Sb and Mg) were also observed depending upon brands. Among them, Ti, Rh, Sb and Pb are not suitable to contain in drinking water bottle due to their leachable ability into water, but Ti and Pb were observed only in cap of the drinking water bottles. If they leach into water from the bottles, their accumulation may lead to adverse reaction to human health depending on their concentration.
SUBJECT HEADINGS: FTIR-ATR, Polymer, Elements, WDXRF, Water bottle