purity; degree of purity
Refers to the proportion of a pure substance in a material, often used in chemistry, metallurgy, and food contexts.
The purity of this gold is 99.9%.
High-purity silicon is used in semiconductors.
This gold has a high degree of purity.
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'.