Which statement about Flame Atomic Absorption is true?

• A. It uses a flame as the atomization source.
• B. It uses a graphite furnace as the atomization source.
• C. It uses a laser as the atomization source.
• D. It does not involve atomization.

Answer: (A)

Flame Atomic Absorption relies on turning the sample into free atoms in a flame so they can absorb light at a specific wavelength. The flame serves as the atomization source, which is essential because only atoms (not molecules) absorb at the characteristic line used for analysis. A graphite furnace is used in electrothermal AAS, not in the flame method, so that option describes a different technique. Laser-based approaches exist, but they’re separate variants and not the standard flame method. And since atomization is required to measure absorption, saying there’s no atomization would be incorrect.