3.3. Identification of FOG from tea samples on UHPLC and HPLC
Based on the previous mass of experimental data on HPLC and
FOG compounds isolation assays by our group since the 1990s
(Engelhardt et al., 1992; Hilal, 2010), 18 kinds of FOG compounds
were verified and identified from green tea and oolong tea samples
this time. The FOG compounds were numbered in the HPLC and
UHPLC chromatograms in Fig. 2, based on their HPLC–MSn