General employed flames:

The most general employed flames within flame photometry could be grouped within two types:

1. Flames in that the fuel and oxidant as air or oxygen are well mixed before combustion; these are known as pre-mix or laminar flames as they exhibit laminar flow.

2. Flames in that the fuel gas and the oxidant are first mixed within the flame itself.

They are called unpremix or turbulent flames because they exhibit turbulence.

For presently, let us learn about the structure and the reactions taking place within the different regions of the flame.