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Mass Spectrometry Forum Discuss and post questions about LC-MS, Q-STAR, MALDI-TOF, and other Mass Spectrometry Questions in the Mass Spec Forum.


Mass spec ratio question

Mass spec ratio question - Mass Spectrometry Forum

Mass spec ratio question - Discuss and post questions about LC-MS, Q-STAR, MALDI-TOF, and other Mass Spectrometry Questions in the Mass Spec Forum.


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  #1  
Old 04-02-2007, 05:29 PM
Pipette Filler
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Default Mass spec ratio question



Hi there-
I can't seem to find a good explanation and/or reference to answer the following question. The explanations I have been given seem really circular. I am hoping someone out there can help. Why do mass specs measure ratios more precisely than a single molecule?

thank you.
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Old 10-27-2007, 06:40 PM
Pipette Filler
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Default Re: Mass spec ratio question

This is quite obvious. Not only for MS but for every instrument the ratio or relative measures are are always more precise. Because, every instrument has its errors in measurement. Now when a single particular mass is measured, the error contributes in its measure. But the same mass is devided by the mass of another particle the error in both the mass cancels out giving more accurate measure of the ratio.
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Old 07-27-2010, 08:04 AM
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Default Re: Mass spec ratio question

I too agree with you. More over it is most reliable measurement to me.
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