This study presented the aroma and sensory evaluation of black
tea and various instant teas processed by using different techniques.
Based on DSA results, in most cases no significant differences
(p > 0.05) existed among flavour attributes, with some
exceptions. With regard to instrumental analysis, differences in
volatile compounds of instant teas processed from black tea were
observed, albeit to different extents. Thus, during processing steps,
some of the soluble constituents of black tea were retained and
concentrated and some were lost. Among the identified constituents,
acetic acid was the predominant compound in all tea
samples. In general, higher relative concentrations of acids were
detected in instant tea samples than in black tea. Higher concentrations
of volatiles in instant tea samples were found in FDIT, possibly
due to the low temperatures employed during the processing.