BTES and aldehydes analysis in PET-bottled water in Lebanon

Abstract : The aim of this study was to determine benzene, toluene, ethylbenzene, styrene (BTES), formaldehyde, acetaldehyde and benzaldehyde in Lebanese polyethylene terephthalate (PET)-bottled water. Aldehydes were analysed by high-performance liquid chromatography with ultraviolet-visible detection (HPLC/UV-vis) after 2,4-dinitrophenylhydrazine (DNPH) derivatisation and solid phase extraction (SPE) concentration, whereas headspace trap gas chromatograph-flame ionisation detector (GC/FID) was used for BTES determination. Both methods were validated according to the NF XP 90-210 and showed good linearity ranging from 3 (limit of quantification [LOQ]) to 15 mu g L-1 for BTES and from 20 (LOQ) to 900 mu g L-1 for aldehydes. No quantified contamination with BTES, acetaldehyde and benzaldehyde was determined in all analysed fresh Lebanese PET-bottled waters. Formaldehyde was quantified in 3 of the 15 samples at concentrations lower than the maximum contaminant level set by the US Environmental Protection Agency and the World Health Organisation. The samples' exposure to sunlight during 5 months increases the migration of formaldehyde and acetaldehyde. Similar migration increase was observed when the samples were incubated at 40 degrees C during 10 days.
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Submitted on : Wednesday, April 3, 2013 - 4:03:21 PM
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L. Al Rayes, C. O. Saliba, A. Ghanem, Jérôme Randon. BTES and aldehydes analysis in PET-bottled water in Lebanon. Food Additives & Contaminants Part B - Surveillance, 2012, 5 (3), pp.221-227. ⟨10.1080/19393210.2012.698311⟩. ⟨hal-00807476⟩

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