What is thermogravimetric analysis?
Thermogravimetric analysis is a technique used in science and industry to characterize how a solid sample changes as it gradually warms up. The sample may change due to moisture loss, crystal structure changes or molecular changes due to decomposition. This type of analysis is used to characterize polymers and samples of coal, so far paintings and for many other uses. An inert gas may be introduced during heating to prevent oxidation. The output consists of a versus weight loss curve. When they are presented in their differential form, changes in the slope of the curve become peaks, which makes it easier for scientists to recognize the point of transformation in the sample.
Gravimetric analysis or analysis in which the final amount is determined by the sample weighing is usually very accurate analytical technique. Thermogravimetric analysis, on the tdruhá hand is rather descriptive technique. The peaks can be measured in energy released or moved by moving in the sample structure. In some hydrogenated molecules run oute to the top when the heat removes hydration. The heat required to cause such a change is also a measure of the strength of the bond between the molecule and the water molecule.
polymers are often described by thermogravimetric analysis. Scientists look at the point of softening and degradation point and evaluate the analysis of the mixture and the content of the filler. This method can be tested for repetition materials, evaluating the conditions under which combustion occurs.
organic material, such as coal, can be characterized by thermogravimetric analysis. This technique has replaced older more tests needed to assess and evaluate coal among buyers and sellers. The test can evaluate the percentage of moisture, volley, solid carbon and coal ash.
Some kinetic studies or studies determining the speed of reactions are performed by thermogravimetric analysis. These studies are sometimes performed by a continuous analysis of the exhaustthe gases from the sample because they heat up. Kinetic studies can determine the order of the reaction, which means how many molecular species must be combined at each stage of the reaction.
Forensic chemistry has found a home for thermogravimetric analysis. The technique can characterize varnishes and colors. Compared to known samples, the age of certain art parts can be determined. Useful information about the stability of drugs is found using this tool.