In this paper the content of catechins in black fermented tea, imported to Poland by sea from China, India, Indonesia, Kenya, Malawi and Vietnam, was determined. The material was collected directly from ship cargo holds. An isocratic elution system was applied for the separation of catechins in tea. Extracts were prepared from tea samples and analysed for catechin content by HPLC. Catechin identification from chromatograms of examined tea extracts was performed by comparison of retention times with respective standards purchased from Sigma Aldrich. Chromatographic analysis by HPLC shows that examined tea contained (-)-(EGCG) in highest quantities, ranging from 148.9-292.3 mg/l, as proved by comparative analysis with a chromatogram of catechin standards, based on their retention times. Only Chinese tea contained more (-)-(EGC) - 266.2, and (-)-(EC) - 193.6, than (-)-(EGCG) - 148.9 mg/l.
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