Thermal measuring and testing – Thermal testing of a nonthermal quantity
Patent
1992-12-04
1994-10-18
Gutierrez, Diego F. F.
Thermal measuring and testing
Thermal testing of a nonthermal quantity
374 25, 364556, 364577, G01N 2500, G01N 2502
Patent
active
053562178
ABSTRACT:
An automated thermal analysis system and method for the detection and quantitative measurement of analytes having thermally-induced, energy events and associated enthalpy changes is described. The system and method are automated to simplify data acquisition and analysis and to enhance sensitivity. The temperature of at least one sample containing at least one analyte having a thermally-induced, energy event is measured upon heating or cooling through the temperature range of the energy event of the analyte to derive a time-temperature curve corresponding to the enthalpy change of the analyte. From the time-temperature curve and a preselected reference parameter derived therefrom in the vicinity of the energy event region of the analyte, analyte concentration in the sample may be derived from a calibration curve correlating the preselected reference parameter to a normalized sample weight or volume. Alternatively, analyte concentration may be derived by a residual analysis of the time-temperature data or by fitting an n.sup.th order polynomial to data obtained in the energy event region and subtracting therefrom a reference curve obtained by interpolation of pre- and post-event data or by running an inert or analyte-free sample in a separate run.
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Gutierrez Diego F. F.
The Edward Orton Jr., Ceramic Foundation
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