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A critical investigation into the Flavognost method for theaflavin analysis in black tea

✍ Scribed by A. Robertson; M.N. Hall


Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
667 KB
Volume
34
Category
Article
ISSN
0308-8146

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## Abstract The ^13^C and ^1^H spectra of a series of aromatic ketones, ethers and keto‐ethers were studied using the lanthanide shift reagent (LSR) Yb(fod)~3~ and the data analyzed using the lanthanide induced shift (LIS) ratio method. Studies were carried out on phenalenone, 6‐methoxyphenalenone,