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The analytical characterisation of flavonoid photodegradation products: a novel approach to identifying natural yellow dyes in ancient textiles
In a previous study new compounds were detected from light aged natural yellow (flavonoid) dyes on alum mordanted wool. We have now developed a novel technique - negative ion electrospray ionisation quadrupole ion trap tandem mass spectrometry (ESI QIT MS) - for futher study and identification of characteristic flavonoid photodegradation...