Hydroxystilbenes analysis

Figure 2.25 Chromatogram relative to the hydroxystilbenes analysis in a grape skins extract recorded at wavelength 325 nm. 1. piceatannol glucoside 2. trans-resveratrol glucoside 3. piceatannol 4. traws-resveratrol (F. Grippi, personal communication)...

Langer and co-workers [24,25] converted alcohols and phenols prior to GC analysis into TMS ethers by the action of HMDS. The method using silylation with HMDS—TMCS (2 1) was used for the GC of ethylene and diethylene glycols on Apiezon L [26], glycerol on SE-30 [27], polyethers of glycols on XE-61 [28], hydroxystilbenes on SE-52 [29], some flavonoides and related substances on SE-30 [30], plant phenols and related substances on OV-1, OV-17 and OV-25 [31], anthocyanines on OV-225 [32] and amino-chromes on SE-30 [33], Different terpene alcohols were silylated by Seidenstucker [34] within 10 min by heating at 40-60°C with a 6—8-fold excess of TMS-acetamide. The separation was performed on a stainless-steel column (50 m X0.25 mm I.D.) coated with Apiezon L. 

Figures 2.25 and 2.26 show the chromatograms relative to analysis of hydroxystilbenes in a grape skins extract with the chromatographic conditions reported in Table 2.12 recorded at wavelengths 325 and 285,...

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See also in sourсe #XX -- [ ]

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