Talk:Thomson

From Mass Spec Terms
Revision as of 00:14, 7 January 2005 by Kkmurray (talk | contribs)

The thomson is a unit, whereas m/z is a quantity. Therfore, the thomson would not replace m/z. Instead, the dimensionless m/z would be replaced with m/q which has the unit Th.

m/q = n Th

where

  • m/q is the symbol for a quantity of mass/charge
  • n is the numerical value of the quantity m/q
  • Th is the symbol for the unit thomson

Suggested Definition

New format - suggested definitions to appear in Discussion tab:

Thomson
A new unit of the physical quantity mass/charge. The symbol m/q would then be used in place of the dimensionless m/z.

Cooks, R. G. and A. L. Rockwood (1991). "The 'Thomson'. A suggested unit for mass spectroscopists." Rapid Communications in Mass Spectrometry 5(2): 93.

"The Thomson (Th), a unit for mass-to-charge ratio, was proposed to alleviate problems with imprecise terminol. generated by the advent of multiply charged ion mass spectroscopy. The definition proposed for the unit is: 1Th == 1 amu/atomic charge."

This is a Suggested Definition and should only appear under a discussion tab. Note that more than one suggested definition can appear in one discussion