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A new parameter for checking the suitability of alpha-tocopherol standards
1Institut für Lebensmittelchemie, Westfälischen Wilhelms-Universität, Münster, Germany.
Zeitschrift Fur Lebensmittel-Untersuchung Und -Forschung
|January 1, 1996
Abstract:
The quality of an alpha-tocopherol standard can be checked easily by measuring the UV absorbance at minimum (255 nm, Amin) and maximum (292 nm, Amax) wavelengths in n-hexane. If the quotient Amin/Amax exceeds 0.18, the standard contains less than 90% alpha-tocopherol and the determination at 292 nm will yield inaccurate results.