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Pure Appl. Chem. Vol. 73, No. 10, pp. 1625-1639 (2001)

Pure and Applied Chemistry

Vol. 73, Issue 10

PHYSICAL AND BIOPHYSICAL CHEMISTRY DIVISION
COMMISSION ON THERMODYNAMICS

Standards in isothermal microcalorimetry (IUPAC Technical Report)

Ingemar Wadso1, and Robert N. Goldberg2

1Physical Chemistry 1, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden; 2Biotechnology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA

Abstract: The main calorimetric principles used in isothermal microcalorimetry are briefly discussed. Different chemical calibration and test reactions are discussed, with a focus on reactions suitable for ambient conditions: reactions initiated by mixing of liquids (including titration microcalorimetry), dissolution of solid compounds and of slightly soluble gases, a photochemical process, and thermal power signals released over an extended period of time. Guidelines on the use of standardized chemical test and calibration reactions in isothermal microcalorimetry are presented. A standardized terminology in reporting characteristics of isothermal microcalorimeters is proposed.

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