1-L-谷氨酸-1-脱氧-D-果糖的热裂解分析研究  

Pyrolysis analysis of 1-L-glutamic-1-deoxy-D-fructose

作　　者：毛多斌[1] 李山[1] 牟定荣 彭国岗 白晓莉 贾春晓[1] 杨靖[1] 

机构地区：[1]郑州轻工业学院烟草科学与工程学院、河南省郑州市科学大道166号,450000 [2]红塔集团技术中心,云南省玉溪市653100

出　　处：《中国烟草学报》2014年第2期18-29,共12页Acta Tabacaria Sinica

基　　金：中国烟草总公司卷烟增香保润重大科技专项“糖衍生物类香味前体物质合成分析及其应用技术研究”(合同号:110201101025(BR-07))

摘　　要：采用热重-微分热重技术研究了1-L-谷氨酸-1-脱氧-D-果糖的热失重和裂解温度,通过在线裂解气质联用技术分别分析研究了无氧和有氧条件下1-L-谷氨酸-1-脱氧-D-果糖在300℃、600℃、750℃和900℃四个温度的热裂解产物。研究结果表明1-L-谷氨酸-1-脱氧-D-果糖的裂解温度为161.3℃,在700℃时失重达到90.50%。无氧和有氧条件下裂解产物的种类和数量随着裂解温度升高而增多,有氧条件下裂解产物总数稍多于无氧条件,但种类有明显差异。无氧裂解和有氧裂解产物主要为酮类、吡咯类、吡啶类、呋喃类、吡嗪类、吲哚类以及少量芳香族化合物。有氧热裂解产物的香韵分析结果表明1-L-谷氨酸-1-脱氧-D-果糖裂解产物具有烘烤香、坚果香、甜香、花香、奶香等香韵。Thermal gravimetric analysis and pyrolysis temperature of 1-L-glutamic-1-deoxy-D-fructose were investigated by thermogravimetryderivative thermogravimetry analysis（TG-DTG）. Pyrolysis analysis of 1-L-glutamic-1-deoxy-D-fructose was performed by an on-line pyrolysis gas chromatography-mass spectrometry（Py-GC-MS） at temperatures of 300 ℃,600 ℃,750 ℃ and 900 ℃ under atmosphere of pure nitrogen and mixing of nitrogen and oxygen（v/v 9：1） respectively. Results indicated that pyrolysis temperature of 1-L-glutamic-1-deoxy-D-fructose was 161.3℃ and weight loss at 700℃ reached 90.50%. When 1-L-glutamic-1-deoxy-D-fructose was treated under oxygen-free and oxygen-presence conditions, both varieties and amount of pyrolysis products increased when pyrolysis temperature rose from 300 ℃ to 900 ℃. The amount of products under aerobic condition was slightly more than that under oxygen-free condition. The variety of products between two conditions was significantly different. Ketones, pyrroles, pyridines, furans, pyrazines, indoles and a few aromatic compounds were found in the pyrolysis products under two conditions. Analysis on flavor notes of aerobic pyrolysis products indicated that pyrolysis products of 1-L-glutamic-1-deoxy-D-fructose featured baked, nutty, sweet, floral and creamy flavors.

关 键 词：1-L-谷氨酸-1-脱氧-D-果糖 热裂解 热重分析 气相色谱-质谱联用 

分 类 号：TS411[农业科学—烟草工业] TS264.3