期刊
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
卷 16, 期 3, 页码 406-408出版社
SPRINGER
DOI: 10.1016/j.jasms.2004.11.022
关键词
-
资金
- NCI NIH HHS [1P01CA49210] Funding Source: Medline
- NCRR NIH HHS [P41RR00954] Funding Source: Medline
The aim of this week is to evaluate quadrupole/ time-of-flight (QTOF) mass spectrometry for simultaneous measurement of accurate mass and quantification of a target by using a stable isotopically labeled internal standard. Mixtures of caffeine and C-13(3)-caffeine (internal standard) at different concentration ratios were analyzed by capillary HPLC/QTOF. A calibration plot for quantification is linear over a factor of 20. Without invoking any correction scheme, the mass accuracy seriously degraded when the ratio of the mass standard to the test compound was not unity. The accuracy could be restored to approximately 2 ppm by using a quadratic function to correct the measured mass as a function of the measured signal ratio of target and internal calibrant. (J Am Soc Mass Spectrorn 2005,16, 406-408) (C) 2004 American Society for Mass Spectrometry.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据