Saad M Magdy
National Research Centre
Egypt
Title: Phthalates released from plastic bottles to inner drinking water which threaten food safety
Biography
Biography: Saad M Magdy
Abstract
This work is an attempt to monitor the most recent hazards of phthalate(s) in bottled drinking water recently consumed in Egyptian markets. A simple and reliable method was applied to detect 6 phthalate congeners in bottled drinking water at trace concentrations up to 10 ng./ ml. The variables of 3 different brands, bottle size (1, 2 & 5 liters), storage time ( 0, 1, 3 & 6) were considered in the experimental design. Liquid/ liquid extraction using methylene chloride/ n-hexane (80:20 v/v) was adopted for isolation and clean-up. Gas chromatography-mass spectrometry (GC-MS) was applied for separation and quantization. The linear range of the GC-MS calibration of 0.3- 1.5 ug./ ml., with a mean correlation coefficient of 0.98 + 0.007, the detection limit was < 0.1 ug./L. and the recovery percentage was 88%. Data showed that <90% of the inspected bottled water samples were phthalates-free. Qualitative data revealed that the contaminated samples contained only 2 out of 6 studied congeners, namely di-2 ethylhexyl phthalate (DEHP) and di-n octyl phthalate (DOP). While, quantitative data exhibited concentrations not exceed 8 ug./ liter of drinking water.
