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Determination and distribution of phthalate diesters in beverage collected from Hanoi, Vietnam

Among studied phthalates, di(2-ethylhexyl)phthalate (DEHP) and di(noctyl)phthalate (DnOP) were measured at high levels and ranged from 10.3 to 41.3 ng/mL and 6.65 to 32.4 ng/mL, respectively. However, concentration of detected analyses in samples was below maximum residual level according to Vietnamese national regular as well. | VNU Journal of Science: Natural Sciences and Technology, Vol. 34, No. 4 (2018) 16-20 Determination and Distribution of Phthalate Diesters in Beverage Collected from Hanoi, Vietnam Le Minh Thuy1,2, Nguyen Thi Ngoc Anh3,4, Le Thi Trinh4, Le Quang Huong1, Pham Thi Phuong Thao1, Nguyen Quang Trung1, Tran Manh Tri2,* 1 Centre for Research and Technology Transfer, VAST, 18 Hoang Quoc Viet, Hanoi, Vietnam 2 Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, Hanoi, Vietnam 3 Institute of Environmental Technology, VAST,18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam 4 Faculty of Environment, Hanoi University of Natural Resources and Environment Received 08 November 2018 Revised 10 December 2018; Accepted 11 December 2018 Abstract: Phthalates, industrial synthetic chemicals, have been widely used to improve the flexibility of plastics. The more plastic products are used, the more phthalates are found in the environment. In spite of their significant benefits in our lives and industry, their effects on the reproduction and toxicities in laboratory animals have been shown in some studies. Nethertheless, until now the comprehension on occurrence, distribution, and risk assessment of human exposure to phthalates has been limited in Vietnam. In this work, a gas chromatography system in combination with mass spectrometry has been introduced for analysis nine phthalates in beverage collected from Hanoi. The linearity ranged from 1,00 to 1000 ng/mL with R2 ≥ 0.998. The method detection limits (MDLs) and method quantitative limits(MQLs) of phthalates in beverage were from 0.01to0.05 ng/mL and 0.03 to 0.15 ng/mL, respectively. The recoveries of surrogate compounds ranged from 73.4 ± 5.5% (d4-DPP) to 91.6 ± 9.9% (d4-BzBP), with RSD≤10.7%. The total concentrations of phthalates in several brands of beverages collected from Hanoi, Vietnam were found at ranging of18.2- 86.0 ng/mL. Among studied phthalates, di(2-ethylhexyl)phthalate (DEHP) and di(noctyl)phthalate (DnOP) were