A high sensitivity titration calorimeter using pyroelectric sensor |
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Authors: | E. K. Merabet H. K. Yuen W. A. Grote K. L. Deppermann |
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Affiliation: | (1) Monsanto Corporate Research, Monsanto Company, 800 N. Lindbergh Blvd., St. Louis, MO 63167, USA |
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Abstract: | A new sensitive isothermal titration microcalorimeter using polyvinylidene difluoride (PVDF) as detector has been developed. Heat pulses of less than 0.4 μJ can be detected and the baseline noise level (p-p) is 40 nW. The calorimeter is constructed with one reaction cell (0.7 ml) insulated by several radiation shields inside a vacuum chamber. The performance of the instrument was examined by measuring the heat of protonation of Tris with HCl. The enthalpy of reaction was found to be ?49±1 kJ·mol?1, in good agreement with the reported value of ?47.5 kJ·mol?1. |
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Keywords: | microcalorimeter pyroelectric sensor titration calorimeter |
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