| 牡荆素的飞行时间质谱 |
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| 引用本文： | 朱仁发,李前荣,尹浩.牡荆素的飞行时间质谱[J].中国科学技术大学学报,2007,37(11):1422-1426. |
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| 作者姓名： | 朱仁发 李前荣 尹浩 |
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| 作者单位： | 1. 合肥学院化学与材料工程系,安徽合肥,230022
2. 中国科学技术大学合肥微尺度物质科学国家实验室,安徽合肥,230026 |
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| 基金项目： | 安徽省教育厅自然科学基金 |
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| 摘 要： | 利用台式飞行时间质谱的中分辨本领,研究了牡荆素的电子轰击质谱的裂解规律,对裂解途径进行了完全的指认.5个主要碎片峰可以作为鉴定牡荆素的特征离子.其中2个对应于失水离子:m/z414(39%)和378(6%);另外3个分别为黄酮苄基离子m/z283(基峰),甙元离子m/z270(19%)和黄酮乙炔离子m/z294(8%).此外,3个低丰度的离子,即2个互补离子m/z165和m/z118以及黄酮乙醛离子m/z312,可以作为鉴定牡荆素的佐证.
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| 关 键 词： | 牡荆素 飞行时间质谱 电子轰击 裂解途径 |
| 文章编号： | 0253-2778（2007）11-1422-05 |
| 收稿时间： | 2006-05-29 |
| 修稿时间： | 2006-09-04 |
Time-of-flight mass spectrometry of vitexin |
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| ZHU Ren-fa,LI Qian-rong,YIN Hao.Time-of-flight mass spectrometry of vitexin[J].Journal of University of Science and Technology of China,2007,37(11):1422-1426. |
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| Authors: | ZHU Ren-fa LI Qian-rong YIN Hao |
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| Abstract: | Using moderate resolution capabilities of a desk time-of-flight(TOF)instrument,the fragmentation regularity from electron impact mass spectra of vitexin was studied.A full assignment for the proposed fragmentation pathway was presented.Five main characteristic fragment peaks were observed,which could be used for identification of vitexin.Among them,two fragments at m/z 414(39%)and 378(6%)correspond to the loss-water ions;the other three fragments are the flavone benzyl ion at m/z 283(base peak),the aglycon ion at m/z 270(19%)and the flavone acetylene ion at m/z 294(8%),respectively.In addition,three ions with small abundances could be found as evidence:two mutual-complementing ions at m/z 165 and m/z 118,and one flavone acetaldehyde ion at m/z 312. |
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| Keywords: | vitexin TOF mass spectrometry electron impact fragmentation process |
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