揮発酸の溜出比による鮮度判定法の研究-III : 揮発酸溜出状態の検討
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概要
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Steam disty situation of the volatile fatty acids and lactic acid in H2SO4 solution was examined, and their dist. speed, rate and the ratio were relatively with each other as follows: 1. In the same wt. according to higher number of carbon atom in v.f.a., the speed is more fast, the rate is larger and the ratio is smaller. But in the same acid increasing., at the C1C2-group the speed is more fast, the rate is larger and the ratio is greater, and yet at the C3C4-group they are the contrary. 2. Lactic acid in a few wt. is distilled by steam and according to increase in wt. the 2nd ratio (to the 1st fraction) is smaller, then approachs some number (130?) gradually. 3. The ratios are not affected by amount of the acids, but by their propotion. Therefore that the 2nd ratio becomes a smaller number with spoilage of fish-flesh, is caused by the proportion of v.f.a in the flesh in which higher acids such as propionic and butyric acid increase than lower, formic and acetic acid.
- 公益社団法人 日本水産学会の論文