高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1167.doi: 10.3969/j.issn.0251-0790.2012.06.009

• 分析化学 • 上一篇    下一篇

双路独立可调离子源用于分子质量的准确测定

马力坡1, 王光辉3, 辛斌3, 陈义1,2,3   

  1. 1. 中国科学院化学研究所活体分析化学院重点实验室, 北京 100190;
    2. 北京分子科学国家实验室, 北京 100190;
    3. 北京质谱中心, 北京 100190
  • 收稿日期:2011-07-25 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 陈 义, 男, 博士, 研究员, 博士生导师, 主要从事微量分离、鉴定与成像研究. E-mail: chenyi@iccas.ac.cn E-mail:chenyi@iccas.ac.cn
  • 基金资助:

    国家自然科学基金(批准号: 21027003)资助.

Independent Adjustable Ion Source for Accurate Mass Determination

MA Li-Po1, WANG Guang-Hui3, XIN Bin3, CHEN Yi1,2,3   

  1. 1. Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2. Beijing National Laboratory for Molecular Science, Beijing 100190, China;
    3. Beijing Center for Mass Spectrometry, Beijing 100190, China
  • Received:2011-07-25 Online:2012-06-10 Published:2012-06-10

摘要: 研制了一种可移动的大气环境电喷雾离子化源, 用其构建了位置可调的双路离子源, 能分路、同时注入待测样品与标准. 将其与四极杆-飞行时间( Q-TOF)质谱联用进行研究, 证明其能独立、动态调节待测样品和标准的质谱信号或峰高比例, 适于有限样品质量的准确测定, 质量误差一般<2×10-6, 最大不超过5×10-6.

关键词: 大气环境电喷雾离子枪, 可调双离子源质谱, 准确质量测定

Abstract: Ambient electrospray guns were fabricated. They worked independently and could easily be set at any ambient inlet of a mass spectrometer(MS) such as Quadrupole-Time of Flight(Q-TOF) MS. By adjusting the distance and/or angle of their nozzles to the inlet, the signal intensity was dynamically regulated without any change of sample concentration and stop of the equipment. Using two of such guns, sample and calibrants were sprayed, ionized and introduced into the mass spectrometry separately but simultaneously. The peak ratio of sample to calibriant was dynamically adjusted to about 1: 1 and high accurate molecular mass was measured, with an error of -2.7?10-6 which was -2.9?10-6 by common internal calibrating determination. The method has been validated by a long time(>20 months) measure of different samples(>100) from various laboratories. The overall mass errors were kept within ?5?10-6. It can be concluded that the method is facile, flexible, time- and cost-effective, and universally applicable.

Key words: Ambient electrospray gun, Adjustable double ion source quadrupole-time of flight mass spectro-meter, Accurate mass determination

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