Determination of polycyclic aromatic hydrocarbons concentration in eight brands of black tea which are used more in Iran

Document Type : Original Article

Authors
Fazel Mohammadi-Moghadam 1
Marziyeh Farhadkhani 1
Afshin Ebrahimi 1
Mohammad Mehdi Amin 1
Mehdi Khiadani (Hajian) 1
Fariborz Momen Beik 2
1 Environment Research Center, Isfahan University of Medical Sciences (IUMS), Isfahan and Department of Environmental Health Engineering, School of Health, Student Research Center, IUMS, Isfahan, Iran
2 Department of Chemistry, University of Isfahan, Isfahan, Iran
10.4103/2277-9183.122427
Abstract
Aims : The objective of this study was investigation of the polycyclic aromatic hydrocarbons (PAHs) concentration in eight brands of black tea which is used more in Iran. Materials and Methods : In the present study, PAHs content of eight brands of black tea were extracted and analyzed with gas chromatography-mass spectrometry (GC-MS) equipped with Selected Ion Monitoring (SIM) technique. Results: The average of total PAHs compounds in analyzed teas was in the range of 139 to 2082 μg kg ?−1 . PAHs with 5 to 6 rings were not found in the teas samples. Four rings PAHs compounds composed 46% of the total PAHs compounds and were the most dominant compounds. The same compounds were also dominant in tea bags. Conclusion: In the tea liquor, after brewing times of 10 and 120 minutes, the maximum and minimum releasing percentage of PAHs was observed, respectively. The result of this study confirmed the presence of PAHs in the tea leaves and tea liquor. Assuming that every person use 10 g of tea leaves every day and 10 minutes take for brewing time, the daily uptake of 16 PAHs will be 1.2 μg.
Keywords
Black tea
gas‑chromatography
poly aromatic hydrocarbons
International Journal of Environmental Health Engineering (IJEHE)
Volume 2, November
Autumn 2013
Pages 1-5

  • Receive Date 03 February 2023