Inductively coupled plasma emission spectroscopy

If high enough temperatures can be reached, any element can be excited to a level where it will produce emission of radiation. Such high temperatures can be achieved by using plasma emission. A schematic diagram of an inductively coupled plasma (ICP) 'torch' is shown in Figure 6.6.

High temperatures are achieved by heating argon with high intensity radiofrequency radiation. At such high temperatures all elements will emit radiation as they are excited and then return to the ground state. In order to derive spectral information from the process an efficient monochromator and computer processing of the data are required in order to unscramble the large number of lines that are derived from a particular sample. ICP has been used to determine a complex of the metal ion dysprosium, which is used as a magnetic resonance imaging contrast agent, in serum.1

Sample in argon plasma at 7000°C

Radio frequency induction coils

Argon

Sample aerosol in argon

Sample in argon plasma at 7000°C

Radio frequency induction coils

Schematic diagram of an ICP torch.

Argon

Sample aerosol in argon

References

1. J-J Lai and G.C. Jamieson. J. Pharm. Biomed. Anal. 11, 1129-1134 (1993). Further reading

Practical Pharmaceutical Chemistry Vol 2. A.H. Beckett and J. Stenlake, eds. Athlone Press, London (1988).

Applications of Atomic Spectrometry to Regulatory Compliance Monitoring, 2nd Edn. S.W. Jenniss,

S.A. Katz and R.W. Lynch, eds. A Wiley-VCH Publication, Chichester (1997). Atomic Absorption and Plasma Spectroscopy, 2nd Edn. J.R. Dean and D.J. Ando. eds. J. Wiley and Sons, Chichester (1997).

Was this article helpful?

0 0
Cure Tennis Elbow Without Surgery

Cure Tennis Elbow Without Surgery

Everything you wanted to know about. How To Cure Tennis Elbow. Are you an athlete who suffers from tennis elbow? Contrary to popular opinion, most people who suffer from tennis elbow do not even play tennis. They get this condition, which is a torn tendon in the elbow, from the strain of using the same motions with the arm, repeatedly. If you have tennis elbow, you understand how the pain can disrupt your day.

Get My Free Ebook


Post a comment