Using many methods of chemical and physical analysis.

Chemical analysis is used to test the purity of materials. We know today a very great number of analysis methods.

These substances are very pure materials, having a serious quality certificate, prepared only by authorized laboratories, intended to be used as reference materials for chemical analysis, validation of analysis methods, checking of instruments, legal analysis etc.

There are many well known methods of chemical analysis. Some of the more famous chemical analysis methods include cyclic voltammetry and Ion Microphobe.

Thermal analysis is when the properties of different materials are studied as they change with temperature. There are several methods available for this, such as: DEA, DTA, DSC, DIL, DMA, EGA, LFA, TGA, TMA, and TOA.