Journal of Thermal Analysis and Calorimetry

, Volume 88, Issue 3, pp 751–755

Compensation law again

Article

DOI: 10.1007/s10973-006-8139-4

Cite this article as:
Norwisz, J. & Musielak, T. J Therm Anal Calorim (2007) 88: 751. doi:10.1007/s10973-006-8139-4

Abstract

Some preliminary considerations suggest that the so-called ‘compensation law’ is a result of the misinterpretation of evaluation procedure. The both parameters: pre-exponential factor and activation energy are calculated from the same set of experimental data. A confidence ellipse could describe the precision of these parameters. In the case of using the least square method for straight-line parameters evaluation, we could calculate a axes of the ellipse, using experimental data. If the observed relationship between pre-exponential factor and activation energy agree with the ‘pre-calculated’ direction of main axis of confidence ellipse, we have a strong support to believe that the observed ‘compensation’ effect is only an artificial effect of misinterpretation. Some calculations performed for a published experimental data have confirmed these suspicions. This also, indirectly indicates that precision of such experiments is probably lower than expected.

Keywords

apparent linear relationshipcompensation effectcompensation lawconfidence ellipsecovariance matrix

Copyright information

© Springer Science+Business Media, LLC. 2007

Authors and Affiliations

  1. 1.Department of Non-Ferrous MetallurgyAGH — University of Science and TechnologyCracowPoland