Enantiomeric separation and precise quantification of chiral volatiles in Wuyi rock teas using an efficient enantioselective GC × GC-TOFMS approach

•A novel Es-GC×GC-TOFMS approach to separate chiral volatiles in tea was established.•Volatile enantiomers in Wuyi rock teas from four cultivars were firstly quantitated.•Limits of quantitation of linalool oxides A−B in teas were as low as 0.2 pg/mL.•R-α-Ionone, S-(E)-nerolidol etc. were the potential markers to distinguish cultivar.•7 Volatile enantiomers were identified as aroma-active compounds in Wuyi rock teas.