二肽Amadori中间体的合成、表征及在卷烟中的应用
Amadori compounds of dipeptides: synthesis,characterization and application in cigarettes
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摘要: 以具有代表性的三种二肽Gly-Gln,Ala-Gln和Gly-Gly为氮源,以葡萄糖为糖源,制备了三种二肽Amadori中间体(APs).采用HPLC监控反应进程以比较三种二肽的反应活性,其顺序依次为Ala-Gln >Gly-Gln >Gly-Gly.采用LC-MS/MS和ESI-MS/MS对三种二肽的APs的纯度及断裂模式进行表征和分析,结果表明,三种二肽APs的LC/MS纯度分别可达95%(Gly-Gln-APs)、97%(Ala-Gln-APs)和98%(Gly-Gly-APs),三种二肽APs断裂模式相似,主要碎片离子包括丢失糖分子形成的[M-162]+和[M-180]+碎片离子,以及丢失水分子形成的[M-36]+和[M-84]+离子.加香应用评价表明,三种二肽APs皆能与烟香谐调,提高香气量和烟气浓度,其中Ala-Gln-APs添加效果最好,对卷烟的香气特征和口感特性皆有明显的正面作用.
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关键词:
- 二肽 /
- Amadori中间体 /
- Maillard反应 /
- 卷烟加香
Abstract: Three dipeptide Amadori intermediates (APs) were prepared by three representative dipeptide Gly-Gln, Ala-Gln and Gly-Gly as the nitrogen source, and glucose as sugar sources. The reaction process was monitored by HPLC to compare reactivity of dipeptides, the reactivity order is Ala-Gln> Gly-Gln> Gly-Gly. The purity and fracture modes of three dipeptide APs were characterized and analysis using LC-MS/MS and ESI-MS/MS.The results showed that the LC/MS purity of three dipeptide APs was up to 95% (Gly-Gln-APs), 97% (Ala-Gln-APs) and 98% (Gly-Gly-APs). Three fracture pattern of dipeptide APs was similar, the main fragment ions including loss of sugar molecules formed [M-162]+ and [M-180]+ fragment ions; and loss of water molecule is formed [M-36]+ and [M-84]+ ions.The cigarette application evaluation showed that the three dipeptide APs have encountered with incense smoke harmonize and improve the aroma and the amount of gas concentration, wherein Ala-Gln-APs shows the best effects. An obvious positive effect could be found both in aroma and taste characteristics.-
Key words:
- dipeptide /
- Amadori compounds /
- Maillard reaction /
- cigarette flavoring
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