純度

1. Origins, structure, and basic meaning

• Structure: 純度 (じゅんど) is a noun for the proportion of a desired substance present without impurities.
• Basic usage: 純度の高い水を使う modifies the cleanliness of an experimental material, while 金属の純度は性質に影響する makes composition quality a factor in product behavior.

2. Common pitfalls and similar expressions

• Purity of water and metal
  • 水の純度 and 金属の純度 concern desired composition relative to impurities despite differing materials. They are not moral judgments of cleanliness.