Isolation and identification of rutin as the major mutagen of red wine.

The polyphenolics of a red wine were concentrated by salt-induced phase separation into acetone-alcohol and fractionated by Sephadex LH-20 and multi-layer counter-current chromatography. The mutagenicity of each fraction was evaluated by the Salmonella mutagenesis assay. The mutagen of red wine required activation by both rat-liver microsomal enzymes and human-fecal enzymes (fecalase). The mutagenic component of red wine was purified to homogeneity by reverse-phase high-performance liquid chromatography (RPHPLC) on Lichrosorb C18 and was identified as rutin by UV spectrometry, co-chromatography with authentic standard on RPHPLC and gas-liquid chromatography/mass spectrometry.