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![]() With Heat-flux DSC, the changes in heat flow are calculated by integrating the ΔT ref- curve. ![]() There are two main types of DSC: Heat-flux DSC which measures the difference in heat flux between the sample and a reference (which gives it the alternative name Multi-Cell DSC) and Power differential DSC which measures the difference in power supplied to the sample and a reference. The term DSC was coined to describe this instrument, which measures energy directly and allows precise measurements of heat capacity. Monaselidze in 1964 at Institute of Physics in Tbilisi, Georgia. The first adiabatic differential scanning calorimeter that could be used in biochemistry was developed by P. O'Neill in 1962, and introduced commercially at the 1963 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy. ![]() Typically, reference standards have been metals such as indium, tin, bismuth, and lead, but other standards such as polyethylene and fatty acids have been proposed to study polymers and organic compounds, respectively. Additionally, the reference sample must be stable, of high purity, and must not experience much change across the temperature scan. The reference sample should have a well-defined heat capacity over the range of temperatures to be scanned. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. TA Instruments, Mettler Toledo, Hitachi, Shimadzu, PerkinElmer, Malvern Instruments, NETZSCH Gerätebau GmbHĭifferential scanning calorimetry ( DSC) is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. ![]()
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