小花茉莉净油的分子蒸馏分离-气相色谱-质谱分析

Gas chromatographic-mass spectrometric analysis of Jasminum Sambac Ait by using molecular distillation

为了提高小花茉莉净油在色谱－质谱分析时信号强度和分离度，采用分子蒸馏对小花茉莉净油进行分子蒸馏分离，根据各段特性进行色谱－质谱分析。在15～20Pa真空度条件下，用分子蒸馏仪将小花茉莉净油分成沸程60℃以下，60～90℃、90℃以上（分子蒸馏仪温度）的三段组分，根据各沸程组分特性进行程序升温条件优化，气相色谱－质谱分析。结果显示：小花茉莉净油在气相色谱-质谱分析前经分子蒸馏处理，可以提高组分的色谱分离度和色谱信号，且有较高的匹配度；经谱图检索有59种组分被检出，其中25种组分未见文献报道。该方法能更全面反映物料组成，并且因分子蒸馏的高抗氧化和裂解性能可用于热敏性和易氧化的香精香料的质量监控和常规分析，分析结果可为配方、产品开发和调香提供指导。

In order to improve the signal strength and the degree of separation in GC-MS.Jasminum Sambac Ait was separated by molecular distillation, Jasminum Sambac Ait was separated into three segments （under 60℃, 60-90℃ , over 90℃） by molecular distillation. according to each segments＇ characteristic, the conditions of Molecular Distillation and GC - MS were optimized, It was found that the resolution and intensity of components in chromatographic peaks were enhanced, the same as similarity, Fifty -nine compounds were identified, thirty-five of which were the first reported, Results showed that the method could reflect the material composition more completely, because of the advantages of the molecular distillation in separation of flavors and fragrances with heat -sensitive and easily oxidized, The analysis result could provide guidance for the blend and product development of flavors and fragrances,