A Simple Procedure to Select a Model for Mass Discrimination Correction in Isotope Dilution Inductively Coupled Plasma Mass Spectrometry
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A Simple Procedure to Select a Model for Mass Discrimination Correction in Isotope Dilution Inductively Coupled Plasma Mass SpectrometryAuthor(s)
Date
2015-05Citation
Terán-Baamonde J, Andrade JM, Soto-Ferreiro RM, Carlosena A, Prada D. A simple procedure to select a model for mass discrimination correction in isotope dilution inductively coupled plasma mass spectrometry. J Anal At Spectrom 2015;30(5):1197-1206. http://dx.doi.org/10.1039/c4ja00475b
Abstract
[Abstract] A fast, simple and straightforward procedure to decide on the best model to calculate the mass
discrimination factor in Isotope Dilution Inductively Coupled Plasma Mass Spectrometry (ID-ICP-MS) is
proposed. It is based on the study of the residuals of the different models that are proposed commonly,
viz., the linear, the exponential, the power and Russell's models. However, it can be generalized to
evaluate any model proposed to linearize the relationship between the theoretical/measured isotope
ratios and the mass. The procedure does not involve laboratory extra work, it is rooted on basic statistics
associated with the least squares fit, and can be applied easily by the analysts so that decision making is
fast and reliable. The procedure was exemplified with four different examples where Cd, Cr, Nd and Sm
were determined by ID-ICP-MS.
Keywords
Isotope dilution inductively coupled plasma mass spectrometry
Least squares fit
ID-ICP-MS
Mass discrimination correction
Residuals
Linearization
Mass discrimination factor
Least squares fit
ID-ICP-MS
Mass discrimination correction
Residuals
Linearization
Mass discrimination factor
Editor version
Rights
Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional
ISSN
0267-9477