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| 鸡蛋中三聚氰胺的表面解吸常压化学电离串联质谱法成像 | |
| 引用本文： | 杨水平,陈焕文,杨宇玲,胡斌,张燮,周瑜芬,张丽丽,顾海威.鸡蛋中三聚氰胺的表面解吸常压化学电离串联质谱法成像[J].分析化学,2009,37(3). |
| 作者姓名： | 杨水平 陈焕文 杨宇玲 胡斌 张燮 周瑜芬 张丽丽 顾海威 |
| 作者单位： | 1. 东华理工大学应用化学系,抚州,344000 2. 吉林大学化学院,长春,130023;东华理工大学应用化学系,抚州,344000 3. 吉林大学化学院,长春,130023 |
| 基金项目： | 科技部创新方法基金，江西省科技支撑项目 |
| 摘 要： | 以表面解吸常压化学电离(SDAPCI)串联质谱中获得的三聚氰胺特征碎片离子(m/z 85)为探针,对熟鸡蛋切面进行二维质谱扫描,用不同颜色表示三聚氰胺信号强度的高低,获得了熟鸡蛋切面中三聚氰胺的质谱影像.三聚氰胺的空间分辨率达0.06 mm2,最小采样面积占成像面积的十万分之五.图像表明,绝大部分三聚氰胺(＞99.8%),分布在蛋清中,但分布不均匀;而蛋黄中基本不含三聚氰胺. |
| 关 键 词： | 表面解吸常压化学电离 串联质谱 成像 三聚氰胺 鸡蛋 |
Imaging Melamine in Egg Samples by Surface Desorption Atmospheric Pressure Chemical Ionization Tandem Mass Spectrometry |
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| YANG Shui-Ping,CHEN Huan-Wen,YANG Yu-Ling,HU Bin,ZHANG Xie,ZHOU Yu-Fen,ZHANG Li-Li,GU Hai-Wei.Imaging Melamine in Egg Samples by Surface Desorption Atmospheric Pressure Chemical Ionization Tandem Mass Spectrometry[J].Chinese Journal of Analytical Chemistry,2009,37(3). | |
| Authors: | YANG Shui-Ping CHEN Huan-Wen YANG Yu-Ling HU Bin ZHANG Xie ZHOU Yu-Fen ZHANG Li-Li GU Hai-Wei |
| Institution: | Department of Applied Chemistry;East China Institute of Technology;Fuzhou 344000;College of Chemistry;Jilin University;Changchun 130023 |
| Abstract: | For the first time,the characteristic fragment(m/z 85) of protonated melamine generated in MS/MS spectra recorded using surface desorption atmospheric pressure chemical ionization mass spectrometry has been employed as a molecular probe to image melamine distributed in boiled eggs.With a special resolution of 0.06 mm2,the imaging obtained in x,y dimensions visualized extremely uneven distribution of melamine in the egg samples(ca.1244 mm2),and most melamine(99.8%) was distributed in egg white region.The rat... |
| Keywords: | Surface desorption atmospheric pressure chemical ionization tandem mass spectrometry imaging melamine egg |
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