purity; degree of purity
Refers to the proportion of a pure substance in a material, often used in chemistry, metallurgy, and food contexts.
この金の純度は99.9%です。
The purity of this gold is 99.9%.
This gold has a high degree of purity.
純度の高いシリコンが半導体に使われる。
High-purity silicon is used in semiconductors.
純度99％のアルコールを使った。
I used alcohol with a purity of 99%.
We refined it repeatedly to increase its purity.
純度 is the general scientific term for the purity of any substance, while 品位 is the traditional term specifically used for the fineness of precious metals like gold.
濃度 means the concentration of a substance in a mixture, while 純度 measures how pure (undiluted) that substance itself is.
Compound of 純 (pure) and 度 (degree). The kanji combination directly conveys 'degree of purity'.