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Related Concept Videos

Specific Heat01:16

Specific Heat

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The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
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Differential Scanning Calorimetry (DSC) in Solid-State Characterization of Solid Dispersions: A Practical Guide.

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Differential Scanning Calorimetry (DSC) is crucial for solid dispersion characterization. Optimizing experimental parameters and using complementary methods enhances the accuracy and interpretation of DSC data for reliable solid-state analysis.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Pharmaceutical Sciences

Background:

  • Differential Scanning Calorimetry (DSC) is a key thermal analysis technique for solid-state characterization.
  • It provides insights into crystallinity, polymorphism, and miscibility in materials, especially solid dispersions.
  • Accurate interpretation of DSC data is vital for formulation development.

Purpose of the Study:

  • To critically review thermodynamic and kinetic factors influencing DSC measurements in solid dispersions.
  • To emphasize mechanisms by which experimental variables affect thermal transitions.
  • To provide practical recommendations for improving DSC method reliability.

Main Methods:

  • Literature review of thermodynamic and kinetic factors affecting DSC.
  • Analysis of mechanisms influencing endothermic and exothermic transitions.
  • Examination of experimental design and complementary analytical techniques.

Main Results:

  • DSC thermogram accuracy is sensitive to heating/cooling rates, sample preparation, moisture, and thermal history.
  • These variables can cause artifacts or mask crucial thermal events.
  • Understanding these influences is key to mitigating misinterpretations.

Conclusions:

  • Optimizing experimental parameters is essential for reproducible and interpretable DSC data.
  • Complementary techniques like XRPD and FTIR can support DSC findings.
  • This review serves as a guide for reliable solid-state characterization in solid dispersion development.