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A liquid chromatography‐mass spectrometry study of a black tea liquor using the plasmaspray interface
Author(s) -
Bailey Richard G,
Nursten Harry E,
McDowell Ian
Publication year - 1994
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740660214
Subject(s) - chromatography , chemistry , mass spectrometry , chlorogenic acid , polymer , liquid chromatography–mass spectrometry , glycoside , high performance liquid chromatography , organic chemistry
This paper describes the application of liquid chromatography‐mass spectrometry to the analysis of a black tea liquor, and shows that much useful information can be obtained without sample pretreatment. A tea liquor was applied to a wide‐pore high‐performance liquid‐chromatography column connected to a mass spectrometer by a VG Plasmaspray interface. Pseudo‐molecular ions were obtained from the flavanols, flavanol gallates, chlorogenic acids, 4‐coumarylquinic acids, and caffeine, but the flavonol glycosides were extensively fragmented by the interface. Fragments were obtained from unresolved polymer that supported its previous designation as a flavanol polymer.