NAK-12树脂脱除蚕蛹复合氨基酸异味及褐变物质的研究

本文研究了用NAK－12吸附树脂脱除蚕蛹复合氨基酸异味及褐变色素的条件，初步分析了蚕蛹复合氨基酸异味产生的原因，实验结果表明：当流速为3BV／h时，1ml NAK-12吸附树脂能吸附1．75g蚕蛹复合氨基酸中的异味物质；能吸附1．45g蚕蛹复合氨基酸中的褐变物质。甲醇是异味物质和褐变物质的良好洗脱剂，用pH1．0的甲醇以1BV／h流速洗脱，仅用3．5BV的洗脱剂即可完全洗脱异味物质和褐变物质，蚕蛹复合氨基酸异味产生的可能机理是：加热蚕蛹复合氨基酸液时，其苯丙氨酸，蛋氨酸，蛋氨酸，异亮氨酸，亮氨酸，苏氨酸被氧化脱氨，生成挥发性醛，而其褐变则是赖氨酸，精氨酸与还原糖发生Maillard反应生成褐变物质引起的。

STUDIES ABOUT REMOVING PECULIAR SMELL AND BROWN SUBSTANCES OF SILKWORM COMPOUND AMINO ACID BY NAK-12 POLYMER ADSORBENT

s: It was studied that technology of removing peculiar smell and brown substanceses of Silk worm compound amino acid by NAK-12 polymer adsorbent and reason of forming the smell was also discussed. The result is that the adsorbability of peculiar smell is 1.75 g Silkworm compound amino acid/ml resin ,but the adsorbability of brown substanceses is 1.45 g Silkworm compound amino acid/ml resin while efflux is 3BV/h. The smell and the pigment that was adsorbed by the resin could be fully eluted by 3.5BV methanol which PH is 1.0 and efflux is 1.0BV/h . Reason of forming the smell was Probably that L-threonine, L-methionine, L-isoleucine, L-leucine, L-phenylalanine had been oxidized respectively into volatile aldehyde ,and the brown pigment was formed through Maillard reaction, i. e. L-lysine or Larginine reacted with reducing sugar.