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In order to perform on-line screening procedures for antioxidants in the Ginkgo biloba extract (EGb761), a comparison was carried out between LC–DAD–DPPH analysis used for the determination of DPPH· bleaching and LC–DAD–CL determination applied for the detection of H2O2 and O 2−· scavenging activities. The results demonstrated that 15 antioxidants in EGb 761 could be identified by LC–DAD–CL,...
Computerized image analysis (also known as video densitometry) is a low-cost and efficient technique for quantitative and qualitative analysis of planar separations, for example planar chromatography and gel electrophoresis. The plate is usually captured in black and white. Selecting the proper color channel of the image for analysis enhances the signal-to-noise ratio, however. Three-dimensional visualization...
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