NDLI: Determination of the Rigorous Transfer Function of An Isothermal Titration Microcalorimeter with Peltier Compensation

Content Provider	Springer Nature Link
Author	Velázquez Campoy, A. López Mayorga, O. Cabrerizo Vílchez, M. A.
Copyright Year	1999
Abstract	An old problem in Isothermal Titration Calorimetry is the accurate characterisation of the instrument, i.e. the determination of the instrumental transfer function. Normally, this calibration is performed electrically or through well known chemical reactions, but the transfer function parameters obtained by both methods generally do not agree: the first method normally yields smaller time constants than the second one. This fact is explained by the different path the heat flux takes towards the thermal sink. However, the time constants must be independent of the experiment type (electrical or chemical). In order to attain this independency, a realistic physical model of the system is developed taking into account the different heat sources and the paths in the system and using physically attainable (experimental and theoretical) inputs for testing the model. Important results from the model study are that the instrument is represented by different transfer functions, depending on the heat source location, and that the time constants are the same, regardless of the heat source location. A very simple and fast method based on such non-phenomenological physical model for obtaining the transfer function of an Isothermal Titration Microcalorimeter is applied here.
Starting Page	343
Ending Page	359
Page Count	17
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	57
Issue Number	1
e-ISSN	15728943
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Physical Chemistry Polymer Sciences Measurement Science, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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