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The base catalysed hydrolysis of methyl paraben: a test reaction for flow microcalorimeters used for determination of both kinetic and thermodynamic parameters

The base catalysed hydrolysis of methyl paraben: a test reaction for flow microcalorimeters used for determination of both kinetic and thermodynamic parameters

O'Neill, M.A.A., Beezer, A.E., Labetoulle, C., Nicolaides, L., Mitchell, J.C. ORCID: 0000-0003-2945-3292, Orchard, J.A., Connor, J.A., Kemp, R.B. and Olomolaiye, D. (2003) The base catalysed hydrolysis of methyl paraben: a test reaction for flow microcalorimeters used for determination of both kinetic and thermodynamic parameters. Thermochimica Acta, 399 (1-2). pp. 63-71. ISSN 0040-6031 (doi:10.1016/S0040-6031(02)00401-X)

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: base catalysed hydrolysis of methyl paraben
Subjects: Q Science > QD Chemistry
Pre-2014 Departments: School of Science
School of Science > Medway Sciences Research Group
Related URLs:
Last Modified: 14 Oct 2016 09:11
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/4185

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