SUMMARY— Four solvents, 95% ethanol, methanol, and both ethanolic and aqueous acetone, were used to extract leucoanthocyanin from Bartlett pears. Ethanol extracted approximately one‐fourth, methanol one‐third, and acetone somewhat less than two‐thirds, based on the amount in the corresponding slurry. Conversion of leucoanthocyanin to anthocyanidin was influenced by the dispersing medium, the normality of the butanol in which the conversion was effected, and the source of the leucoanthocyanin (pear mart, slurry, or synthetic leucocyanidin). When ethanolic acetone was the dispersing medium, yields of anthocyanidin were greatest. Developer acidified to a normality of 0.025 compared to 0.6 reduced phlobaphene formation and gave higher yields of anthocyanidin except in the case of pear mart previously extracted with 70% ethanol and then dispersed in acetone. When conversion was effected at a normality of 0.025, yield of anthocyanidin from the mart of pear in acetone was somewhat less than half that obtained when ethanol was the dispersing' medium, that from the slurry was 25% greater, and the yield from synthetic leucocyanidin was almost twice as great.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.