The Change to the Elapse of Time of Vitamin A in the Margarine in Market

Kimitoshi NAKAZAWA, Isao NIIYA, Motoko IMURO
1961 Journal of Japan Oil Chemists' Society  
This report deals with monthly investigation of vitamin A in 15 kinds of enriched household margarine (of which 13 are of JAS and the rest of quasi-JAS) kept at room temperature for 12 months, and at the same time, of the correlation with P.O.V. Vitamin A of samples showed 36,900 I.U./450g at maximum, 18,200 at minimum and 26,370 on average, well above the level of European and American standard margarine. The average remaining % of vitamin A was 84.4 after 3 months, 76.3 after 6, 71.6 after 9
more » ... nd 68.6 after 12, showing stable quality. 8 samples considered to contain milk ingredient showed a much better result than those without it with a few exceptions. Even when much mold came out, 53.5% was remaining after 12 months. 7 samples containing lauric oil which is generally 15%, did not show any effect on vitamin A by it. Ester odor, which is caused readily by co-existence of milk ingredient and lauric oil did not show any change in vitamin A. But rancid odor showed considerable reduction of vitamin A. P.O.V. rises after a certain induction period (9 months), but no correlation between increase of P.O.V. and remaining % of vitamin A could be found in comparison with each sample.
doi:10.5650/jos1956.10.179 fatcat:rosx7sbmenfb3dif7jn2zlkg3i