Visible Light-Induced Antibacterial Activity of Pigments Extracted from Dregs of Green and Black Teas

Table 1

Detection of chlorophyll and carotenoid fractions found in the pigments extracted from dregs of green and black teas. The peak numbers correspond to the identified peaks in the chromatograms of Figure 4.

Peak no.	Retention time (min)	Fractions	max (nm)
1	15.8	Pheophorbide a	409	508	538	609	665
2	16.6	Pheophorbide a sp.	409	—	—	—	665
3	28.4	Lutein	447	—	—	—	475
4	33.5	Chlorophyll b	462	—	—	598	647
5	34.5	Pheophytin b sp.	434	—	524	598	652
6	34.9	Pheophytin b	434	—	527	598	652
7	36.0	Pheophytin a sp.	409	503	533	609	664
8	36.6	Pheophytin a	409	506	536	610	665
9	36.8	Pheophytin a’	409	506	538	610	666
10	37.2	β-carotene	455	—	—	—	476
11	37.8	Pyropheophytin a	409	508	538	—	665

These fractions were only detected in the pigments recovered from dregs of black tea.