School of Chemistry and Biochemistry, Thapar University Patiala, 147004, Punjab, India.
Environ Monit Assess. 2013 Aug;185(8):6291-4. doi: 10.1007/s10661-012-3025-y. Epub 2012 Dec 8.
Orthodox black tea is obtained from fresh leaves followed by withering, rolling, fermentation and drying. The presence of 16 priority polycyclic aromatic hydrocarbons (PAHs) was studied in fresh leaves and at various stages of manufacturing. Benzo(a)pyrene (2A: probable human carcinogen) was found in dried tea leaves only whereas, naphthalene (2B: probable human carcinogen) was present during all the stages of manufacturing. Dry tea leaves showed higher content of total 16 PAHs (∑PAHs) about 3 and 211 times than present in withered and dried leaves, respectively. Chrysene, benzo[g,h,i]perylene, indendo[1,2,3-c,d]pyrene, dibenzo[a,h]pyrene and benzo[a]antracene were not found during manufacturing stages of tea.
传统红茶是由新鲜茶叶经过萎凋、揉捻、发酵和干燥制成的。本研究检测了新鲜茶叶和各加工阶段中 16 种优先多环芳烃（PAHs）的存在情况。仅在干茶叶中发现了苯并（a）芘（2A：可能对人类致癌物质），而萘（2B：可能对人类致癌物质）存在于所有加工阶段。干茶叶中总 16 种多环芳烃（∑PAHs）的含量分别比萎凋和干茶叶高出约 3 倍和 211 倍。在茶叶加工过程中未发现苊烯、苯并[g,h,i]苝、茚并[1,2,3-c,d]芘、二苯并[a,h]蒽和苯并[a]蒽。
