Talk:Mass/charge Ratio: Difference between revisions
From Mass Spec Terms
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let's get rid of the ''m/z''. It is conceptually wrong. | let's get rid of the ''m/z''. It is conceptually wrong. | ||
I made a new proposal. | I made a new proposal. | ||
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I moved the [[Suggested Definition]] from the front page and used the new template: | |||
{{Sugdef|m/z|The mass/charge ratio is a physical property that is measured by [[Mass Spectrometer | mass spectrometers]]. | |||
The symbol for the physical quantity mass/charge is ''m/q''. The former ''[[m/z]]'' is based on a missconception and should no longer be used. | |||
The SI unit of the physical quantity ''m/q'' is kilogram/coulomb ('''kg/C'''). | |||
In [[Mass Spectrometry | mass spectrometry]] it is more common to use the [[Atomic Mass Unit]] '''u''' and the [http://www.iupac.org/goldbook/A00504.pdf atomic unit] for charge '''e''' which is equal to the [http://www.iupac.org/goldbook/E02032.pdf elementary charge]. | |||
This means the unit for mass/charge is: | |||
: [''m/q''] = '''u'''/'''e''' | |||
'''u''' is sometimes called [[Dalton]] ('''Da'''). '''u'''/'''e''' is sometimes called [[Thomson]] ('''Th'''). Hence, a [[Mass Spectrum | mass spectrum]] x-axis should be labeled as either of the below: | |||
* ''m/q'' ('''u'''/'''e''') | |||
* ''m/q'' ('''Da'''/'''e''') | |||
* ''m/q'' ('''Th''')}} | |||
(Note that this isn't my def, just my edit to put it on the Discussion page - KKM) | |||
: -- [[User:Kkmurray|K. Murray]] 15:03, 13 Jan 2005 (CST) | |||
