Estimating Realistic Confidence Intervals for the Activation Energy Determined from Thermoanalytical Measurements
Authors:
- 9 June 2000
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 72 (14) , 3171-3175
Abstract
A statistical procedure is proposed for estimating realistic confidence intervals for the activation energy determined by using an advanced isoconversional method. Nine sets of five thermogravimetric measurements have been produced for the process of gassification of ammonium nitrate at five different heating rates. Independent estimates of the confidence intervals for the activation energy have been obtained from these data sets. Agreement with these independent estimates demonstrates that the proposed statistical procedure is capable of adequately estimating the actual uncertainty in the activation energy determined from a small number of measurements. The resulting averaged relative errors in the activation energy were found to be 26, 21, and 17% for three, four, and five heating rate estimates, respectively.Keywords
This publication has 13 references indexed in Scilit:
- Effect of viscosity on the kinetics of initial cure stagesMacromolecular Chemistry and Physics, 2000
- Kinetics of Thermal Decomposition of Cubic Ammonium PerchlorateChemistry of Materials, 1999
- ChemometricsAnalytical Chemistry, 1998
- Kinetic Determinations and Some Kinetic Aspects of Analytical ChemistryAnalytical Chemistry, 1998
- Thermal AnalysisAnalytical Chemistry, 1998
- A Thermogravimetry−Capillary Gas Chromatography/Mass Spectrometry InterfaceAnalytical Chemistry, 1997
- Evaluation of activation energy of thermally stimulated solid-state reactions under arbitrary variation of temperatureJournal of Computational Chemistry, 1997
- Characterization of Nonmicrobiological Paper Mill Deposits by Simultaneous TG−IR−MSAnalytical Chemistry, 1996
- Thermal AnalysisAnalytical Chemistry, 1996
- Reliability of conversion-time dependencies as predicted from thermal analysis dataAnalytica Chimica Acta, 1994