谷氨酸—木糖美拉德中间体的水相制备及其在桃酥中的应用

Aqueous preparation of glutamic acid-xylose Maillard intermediate and its application in walnut cookie

以谷氨酸和木糖为原料,研究反应时间、反应物配比、初始反应pH及真空脱水对谷氨酸—木糖美拉德反应中间体转化率的影响。结果表明,脱水过程可显著提高谷氨酸—木糖美拉德中间体的转化率至75.11%。为研究中间体在烘焙食品中的应用,将中间体以不同比例添加到桃酥中,通过GC/MS及感官评定等方法分析其对桃酥的风味影响,研究发现,中间体的添加可显著提高桃酥中吡嗪、吡咯的含量,丰富焙烤香气。随着中间体添加量的增大,桃酥中挥发性风味物质的总量提高,结合感官评定的结果,最终确定添加0.3%谷氨酸—木糖美拉德中间体时,整体增香效果最好。

The effects of reaction time,reactant ratio,initial reaction pH and vacuum dehydration on the conversion of glutamic acid-xylose Maillard reaction intermediate(Glu-Xyl MRI)were studied and the conversion from Glu to Glu-Xyl MRI could be increased to 75.11% by thermal reaction coupled with vacuum dehydration.Subsequently,the application of the MRI in baked foods was researched.The Glu-Xyl MRI were added into walnut cookie with different proportions,and the flavor of the walnut cookie were analyzed by GC/MS and sensory evaluation.It was found that the addition of Glu-Xyl MRI in walnut cookie could significantly increase the content of pyrazines and pyrroles in walnut cookie and enrich the baking aroma.And with the increase ofthe MRI addition,the total amount of volatile flavor compounds in walnut cookie increased.Combined with the results of sensory evaluation,it was finally determined that the addition of 0.3%Glu-Xyl MRI had the best enhancement effect on overall flavor walnut cookie.