puhtusastet
Puhtusastet is an Estonian term used to describe the purity level of a substance. It indicates how much of the target component is present relative to impurities. Purity is a context-dependent concept, applying to chemicals, materials, water, air, and food ingredients alike. In many fields it is expressed as a percentage or as concentration units such as parts per million.
Purity can be defined for different stages of production, from raw materials to finished products. The required
Measurement methods range from gravimetric and titrimetric assays to instrumental techniques such as chromatography (HPLC, GC),
Standards and regulations establish acceptable puhtusastet for different sectors. In pharmaceuticals, electronics, and food, authorized catalogs
Common examples include water purity grades, chemical reagents rated by purity percent or grade, and semiconductor-grade