Significant factors:

1.         Amount of Sample: Within DTA analysis, peak area of DTA Curve is proportional to the mass of the sample. Certainly this assumption is valid just over a certain range of amount of the sample. Commonly in DTA experiments, a few mg of powdered solid sample is used.

2.         Particle Size: In DTA experiments, Samples in the form of fine powers are commonly preferred except polymers, in that case we may have to use plastic fragments or chopped fibers. While we are comparing among two materials, their sample should have same particle size.

3.         Sample packing: Packing density of sample influences the shape of DTA Curve. Strong packing influences the escape of volatiles and interaction of sample along with atmosphere of furnace due thermal experiments. Thus, a reproducible method of packing a sample is desirable.

4.         Heating rate: It is observed in which an increase within heating rate increases, the procedural peak temperature, and a few time it also increases peak area. Frequent high heating rate results in poor resolution of fine peak in DTA curve. Thus slower heating rate is preferred for DTA experiments. Heating rate of 10° C min-1and 5° C min-1are generally preferred.

5.         Atmosphere around sample: As same to DTG, a flowing gas is preferable to a static atmosphere as in static atmosphere. There is a option of change of atmosphere around sample on its degradation or decomposition especially within case of a volatile sample. In many a case we commonly use flowing gas methods. Flowing gas sweeps away volatile through products and keeps homogenous atmosphere around sample. Within below Table 11.1, we have summarized the main factor that could affect the DTA curve.