A BRIEF OVERVIEW ABOUT FLAME PHOTOMETRY

1. FLAME PHOTOMETRY

6. MAJOR COMPONENTS-
1. Sample delivery
system
2. Source
3. Monochromator
4. Detector
5. Read out device

7. 1. SAMPLE DELIVERY SYSTEM
There are three components used to introduce liquid sample:
a) Nebulizer- It is a jet of compressed gas which is used to break up the liquid
into small droplets. example-pneumatic nebulizer.
b) Aerosol modifier- it helps to remove large droplets from the stream and
allow only smaller droplets to pass.
c) Flame or atomizer- it converts the analyte into free atoms.

8. SOURCE-
Burners- it is used to convert the fine droplets of sample solution into free
atom.
Types of burner used:
1. Total consumption burner
2. Premix burner
3. Lundergraph’s burner

9. 1. TOTAL CONSUMPTION BURNER
 In this fuel and oxidant are hydrogen and
oxygen gases
 Sample solution is aspirated through a capillary
by high pressure of fuel and oxydant.
 And all these burnt at the tip of the burner.
 Entire sample is consumed.

10. 2. PREMIX BURNER
 In this burner the sample and fuel
oxidant are thoroughly mixed before
aspiration and reaching to the flame.
 Advantages- uniformity of the flame
produced.
 Disadvantage- heavy loss during mixing
(95%)

11. 3. LUNDERGRAPH’S BURNER
 In this burner, sample and air (o2) mixed
together in a chamber
 Then this mixed composition send to fuel
nozzle
 where it get atomized and reaches to the
flame.
 Advantages-
 Disadvantages- only 5% sample reaches
to the flame.

12. Monochromator:
Example- prism, grating
Detector:
Example- photomultiplier tubes, photo emissive cell, photo voltaic cell