Measurement of gas kinetic temperatures for polyatomic ions in inductively coupled plasma-mass spectrometry: Validation and refinements
|Title||Measurement of gas kinetic temperatures for polyatomic ions in inductively coupled plasma-mass spectrometry: Validation and refinements|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||McIntyre SM, Ferguson JW, Witte TM, Houk RS|
|Journal Title||Spectrochimica Acta Part B-Atomic Spectroscopy|
The general method of comparing measured ion ratios to calculated ion ratios to determine a gas kinetic temperature (T(gas)) is reviewed. Various mathematical refinements to the calculated partition functions are examined for their effect on the determined T(gas). It is found that (a) excited electronic states should be included for ArO(+), neutral NO, and O(2); (b) a 10% error in solvent load, sample gas flow rate, vibrational constant (omega), rotational constant (B) or measured ion ratio produces only a 1 to 3% error in T(gas); (c) a 10% error in dissociation energy (D(o)) creates nearly a 10% error in T(gas); and (d) high temperature corrections to the partition functions produce minimal change and can generally be neglected. (C) 2011 Elsevier B.V. All rights reserved.