Fluorescent Dye (Noun)
Meaning
A yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed).
Classification
Nouns denoting substances.
Examples
- The researcher added a few drops of fluorescent dye to the solution to detect the presence of chloride ions.
- Fluorescent dye is commonly used in chemical labs to test for halides such as chloride, bromide, and iodide.
- When the fluorescent dye turned pink, the chemist knew that all chloride ions had been precipitated out of the solution.
- The high dilution of the fluorescent dye made it a sensitive indicator for tracing the progress of the silver chloride precipitation reaction.
- In analytical chemistry, the absorption of the fluorescent dye by silver chloride allows for a quantitative determination of chloride ions.