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Despite the worldwide increase in the consumption ofPET-bottled mineral waters compared to tap waters encouraged by its microbiologicaland chemical safety for public health, contaminants could migrate from theplastic packaging into the water and induce adverse effects on human health.Volatile organic compounds VOCs, including benzene, toluene, ethylbenzene,ortho, meta, and para-xylenes BTEX, styrene, chlorobenzene and benzaldehydeare among the potential contaminants of bottled waters. This study aimed toassess Lebanese PET-bottled waters, in respect of VOCs contents, withcomparison to polycarbonate-bottled and tap waters. Both HS-SPME-GC-FID andSPE-GC-FID were optimized and validated for VOCs determination in the waters,and their performances were compared. The HS-SPME-GC-FID was valid Afnor NF T90-210 May 2009 for all the studied molecules with limits of quantificationsLOQ far lower the maximum contaminants levels MCLs set by both US-EPA andWHO. SPE-GC-FID was valid only for ethylbenzene, m-p-xylenes,o-xylene, and styrene, with poorer LOQs. HS-SPME-GC-FID was used therefore forVOCs monitoring in studied water samples showing the safety of the Lebanesebottled-water. The effects of bottles storage conditions time, andexposure to sunlight on VOCs migration were also studied.

KEYWORDS

BTEX; Styrene; HS-SPME-GC-FID; SPE-GC-FID

Cite this paper

A. Ghanem, J. Maalouly, R. Saad, D. Salameh and C. Saliba -Safety of Lebanese Bottled Waters: VOCs Analysis and Migration Studies,- American Journal of Analytical Chemistry, Vol. 4 No. 4, 2013, pp. 176-189. doi: 10.4236-ajac.2013.44023.





Autor: Aline Ghanem, Jacqueline Maalouly, Roula Abi Saad, Dalia Salameh, Chawki Oscar Saliba

Fuente: http://www.scirp.org/



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