The total mean ∑\(15\overline{\text{PAHs}}\) in samples were from 75.3 to 387.0 ng/g dry weight (d.w) and showed high value in black dry tea, followed by herbal, oolong, and green tea. The mean ∑\(\overline{\text{PAH4}}\) (a combination of benz[a]anthracene, chrysene, benzo[b]fluoranthene, and benzo[a]pyrene) values were 54.3 ng/g, 16.4 ng/g, 14.2 ng/g, and 6.6 ng/g for black, herbal, green, and oolong teas, respectively. Concentration for benzo[a]pyrene (BaP) was from 0.4 to 35.8 ng/g, and the BaP equivalent concentration values ranged from 0.3 to 48.1 ng/g. There was only 1 black tea sample that BaP concentration exceeded the maximum level according to European Union (EU) standards. Tea samples marketed in Vietnam showed insignificant difference with the samples from other origins by same analytical method. Black teas showed high PAHs contents in dry tea samples but the released percentage of sum of PAHs from tea-to-tea infusion was lower than that in other tea type samples. The released percentages of PAH4 from tea-to-tea infusion were 40.7, 15.4, and 1.9 for green, herbal, and black tea. High temperature in black tea manufacturing processes might reduce essential oil content in tea that might effect on the PAHs partially release into the infusion. Indeed, based on EU regulations, we may conclude that tea consumers are safe in risk of exposure to PAHs obtained from teas.

样品中的总平均∑ \（15 \ overline {\ text {PAHs}}} \）为75.3至387.0 ng / g干重（dw），在干红茶中表现出很高的价值，其次是草药，乌龙茶和绿茶茶。平均∑ \（\ overline {\ text {PAH4}} \\）（苯并[ a ]蒽，苯，苯并[ b ]荧蒽和苯并[ a ] py的组合）值为54.3 ng / g，16.4 ng对于黑茶，草药茶，绿茶和乌龙茶，分别为/g、14.2 ng / g和6.6 ng / g。苯并[ a]的浓度py（BaP）为0.4至35.8 ng / g，BaP当量浓度值为0.3至48.1 ng / g。根据欧盟（EU）标准，只有1个红茶样品的BaP浓度超过了最大浓度。用相同的分析方法，在越南销售的茶样品与其他来源的样品没有明显差异。红茶在干茶样品中显示出较高的PAHs含量，但从茶到茶的注入中释放出的PAHs总量的百分比低于其他茶类型样品。绿茶，草药茶和红茶从茶到茶的注入中释放出的PAH4的百分比分别为40.7、15.4和1.9。红茶生产过程中的高温可能会降低茶中的精油含量，这可能会影响部分释放到浸泡液中的PAHs。实际上，根据欧盟法规，