| 释义 |
chemical indicator
chemical indicator[′kem·i·kəl ′in·də‚kād·ər] (analytical chemistry) A substance whose physical appearance is altered at or near the end point of a chemical titration. A substance whose color varies as the concentration of hydrogen ions in the solution to which it is added varies. Also known as indicator. chemical indicator
chem·i·cal in·di·ca·tor (kemi-kăl indi-kā-tŏr) A color change or appearance of a mark indicating that a chemical reaction has occurred. |