Brainlag PlusFlame emission spectroscopy, reading line spectra to find the metal ions in a mixture, and concentrations from a calibration line.
Flame emission spectroscopy
The sample is put into a flame and the light it gives out is passed through a spectroscope.
Each metal ion gives out light at its own wavelengths, so it makes its own line spectrum.
A metal is present only if every one of its lines appears in the sample. Unlike a flame test, this works for mixtures.
Instrumental methods are accurate, sensitive (tiny amounts) and rapid, but the equipment is expensive and must be calibrated.
The rest of this lesson and its 10 practice questions are in Plus.
Screen 1 of 3, free to read.
- 10 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards