| Autor: |
Bukovits, Gabriel, Lezerovich, Alberto |
| Zdroj: |
Journal of the American Oil Chemists' Society (JAOCS); Apr1987, Vol. 64 Issue 4, p517-520, 4p |
| Abstrakt: |
The second order derivative UV spectra of α-, β-, γ- and σ-tocopherols showed small differences that allowed development of a derivative spectrophotometric method for determining individual tocopherols in a mixture. The procedure consists of measuring the second derivative spectrum of the sample at four specified wavelengths and calculating each concentration by means of a method for multicomponent analysis that uses mixtures as standards. Vegetable oils and other fatty products usually require a previous clean-up process (under study) in order to remove interfering substances. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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