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Scratches, represented by triangular-shaped grooves, make the surface area greater.
It is a physical value that can be used to determine 🏧 the type and properties of a material (e.g. soil or snow). It has a particular importance for adsorption, heterogeneous catalysis, 🏧 and reactions on surfaces.
Measurement [ edit ]
Adsorption [ edit ]
The SSA can be measured by adsorption using the BET isotherm. 🏧 This has the advantage of measuring the surface of fine structures and deep texture on the particles. However, the results 🏧 can differ markedly depending on the substance adsorbed. The BET theory has inherent limitations but has the advantage to be 🏧 simple and to yield adequate relative answers when the solids are chemically similar. In relatively rare cases, more complicated models 🏧 based on thermodynamic approaches, or even quantum chemistry, may be applied to improve the consistency of the results, but at 🏧 the cost of much more complex calculations requiring advanced knowledge and a good understanding from the operator.[8]