Inductively Coupled Plasma Emission Spectroscopy (ICP-AES) is an analytical technique for detecting chemical elements in samples, particularly trace metals. The method utilizes inductively coupled plasma to excite atoms and emit electromagnetic radiation, with the intensity of emission correlating to element concentration. The technique has evolved since its first experimental uses in the 1950s and 1960s and is now widely employed in analytical laboratories.

1. Inductively Coupled Plasma
Emission Spectroscopy
Lecture
Taimoor Khan

2. ICP-AES
• ICP-AES is an analytical technique used for the
detection of chemical compound/elements in
the sample.
• Detection of trace metals in samples.

3. History
• 1956
1st
attempt to use plasma emissions as a
source for spectroscopic analysis.
• 1964 Stanley Greenfield
First to use ICP for non experimental
analysis.
• 1975 KONTRON
First commercial machine

4. Principle
• It Uses the inductively coupled plasma to
produce excited atoms and ions that emit
electromagnetic radiation at wavelengths
equal to that of a particular element.
Inductively coupled
plasma
plasma source in which the
energy is supplied by electric
currents which are produced
by electromagnetic induction

5. • Plasma– ionized gas (argon)
• Plasma is sustained and maintained by
inductive coupling from electrical coils at
megahertz frequencies

6. Instrumentation

7. Mechanism
Nubilizer
Solvent vaporization
ICP convert solid to gaseous (atoms)
Excitation of metal at high energy level
Emits light– when back to ground state

8. • Intensity of emission->proportional to
concentration of the element.
• Metals : Ni-398nm
Li-670nm
Ca-622nm