
Analysis of catechins and condensed tannins by thermally assisted hydrolysis/methylation-GC/MS and by a novel two step methylation
Keywords: Thermally assisted hydrolysis and methylation (THM); Tetramethylammonium hydroxide (TMAH); Trimethylsulfonium hydroxide (TMSH); Trimethylsilyl diazomethane; Gas chromatography/mass spectrometry; Condensed tannins