The analysis of black tea liquors with special reference to the thearubigins.
The practical work described in this thesis falls into four distinct
subject areas: HPLC, tea liquor fractionation, mass spectrometry, and NMR
and IR. The practical work, is therefore written in four chapters, each
chapter having its own introduction, results and discussion, and
experimental sections. The work is concerned with the analysis of black
tea liquor, its aim being to provide an analytical input into a larger
project, being carried at NRI (Natural Resources Institute), on the
statistical evaluation of tea quality.