Spectrophotometric assay of tannase
β Scribed by E. Haslam; R.J.N. Tanner
- Book ID
- 108364604
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 359 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0031-9422
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A method for assay of microbial tannase (tannin acyl hydrolase) based on the formation of chromogen between gallic acid and rhodanine is reported. Unlike the previous protocols, this method is sensitive up to gallic acid concentration of 5 nmol and has a precision of 1.7% (relative standard deviatio
## Abstract The benzene washing procedure for the isolation of unsaponifiable residues has been applied to vitamin E preparations containing Ξ±βtocopheryl esters only. The isolation procedure is carried out once (after saponification) or twice (before and after saponification). In the solution thus