| Autor: |
Anthony E. Beezer, Michael A. A. O'Neill, Linda Nicolaides, JA Connor, Chloé Labetoulle, D. Olomolaiye, Richard B. Kemp, John C. Mitchell, J. A. Orchard |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Thermochimica Acta. 399:63-71 |
| ISSN: |
0040-6031 |
| DOI: |
10.1016/s0040-6031(02)00401-x |
| Popis: |
The results of an inter/intra-laboratory study into a test and reference reaction for isothermal microcalorimeters, the imidazole catalysed hydrolysis of triacetin, have been reported in a recent paper [Thermochim. Acta 380 (2001) 13]. The results and conclusions drawn from this study have been extended to a consideration of the need for a similar test and reference reaction for isothermal microcalorimeters operating in flow mode. This paper reports the findings of a preliminary inter/intra-laboratory study of the base catalysed hydrolysis of methyl 4-hydroxy benzoate (methyl paraben) and its suitability as a test and reference reaction. The derived values for the hydrolysis reaction were (3.15 +/- 0.11) x 10(-4) s(-1) and -50.5 +/- 4.3 kJ mol(-1) for the rate constant and enthalpy, respectively. It is also reported how such a test and reference reaction can be used to validate the thermal output from a LKB 10-700-1 and Thermometric Thermal Activity Monitor (TAM) 2277-202 flow microcalorimeters. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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