Table 1: Identification parameters of polyphenolics and xanthines: retention factor, color of band under 366 nm, and spectra after spraying with aluminium chloride (not applicable for caffeine and theobromine).

Bioactive compoundTLC spectra in situ Structure

Chlorogenic acid
= 0.40
λ max = 328 nm
Colour: blue
658596.table.001a658596.table.001b
Ferulic acid
= 0.82
λ max = 330 nm
Colour: blue
658596.table.001c658596.table.001d
Caffeic acid
= 0.30
λ max = 330 nm
Colour: intensive blue
658596.table.001e658596.table.001f
p-Coumaric acid
= 0.77
λ max = 312 nm
Colour: no colour
658596.table.001g658596.table.001h
Naringenin
= 0.75
λ max = 293 nm
Colour: green
658596.table.001i658596.table.001j
Rutin
= 0.49
λ max = 329 nm
Colour: green
658596.table.001k658596.table.001l
Quercetin
= 0.34
λ max = 419 nm
Colour: light green
658596.table.001m658596.table.001n
Kaempferol
= 0.65
λ max = 390 nm
Colour: dark green
658596.table.001o658596.table.001p
Caffeine
λ max = 275 nm
= 0.55
658596.table.001q658596.table.001r
Theobromine
λ max = 275 nm
= 0.47
658596.table.001s658596.table.001t