USING "SILMAG" AS AN ABSORBENT IN DETERMINATION OF RIBOFLAVIN / 营养学报

ABSTRACT

In this paper we recommended a new method, using "Silmag" as an absorbent for the determination of riboflavin content in foods fluorometrically. The lowest detecting value was 0.006 micrograms. The coefficient of variation of riboflavin in determining milk powder and the seed of Job's tears(Coix La-chrymalobi L.)was 2.1% and 3.3% respectively,and the recovery of added riboflavin in bread was 102.7, 102.3 and 99.7% with an average value of 101.4%; milk powder was 96.0, 103.0 and 104.2% with an average of 101.1%. Both precision and accuracy of this method were satisfactory. In determining riboflavin by fluorometric method, the sample must be treated by enzyme after hydrolysis. The "Silmag" can be reactivated after using.