Which atomic spectrometer has the highest atomization temperature? What is theadvantage of having such a higher atomization temperature?

Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively…

Answered: Which atomic spectrometer has the…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Which atomic spectrometer has the highest atomization temperature? What is the
advantage of having such a higher atomization temperature?

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Inductively coupled plasma atomic emission spectroscopy (ICP-AES), also referred to as inductively coupled plasma optical emission spectroscopy (ICP-OES) has the highest atomization temperature nearly 8000 K.
Many different plasma sources exist, but by far the most common is the inductively coupled plasma
(ICP). The ICP is generated by coupling the energy from a radiofrequency generator into a suitable gas
via a magnetic field which is induced through a two- or three-turn, water-cooled copper coil. The
radiofrequency energy is normally supplied at a frequency of 27.12 MHz, delivering forward power at
between 500 and 2000 W. Two gas flows, usually argon, flow in a tangential manner through the outer
tubes of a concentric, three-tube quartz torch which is placed axially in the copper coil .
Because the outer and intermediate gases flow tangentially (i.e. they swirl around as they pass
through the torch), the plasma is continually revolving and has a 'weak spot' at the centre of its base,
through which the inner gas flow, containing the sample, can be introduced. When the gas is seeded
with electrons, usually by means of a spark, the electrons accelerate in the magnetic field and reach
energies sufficient to ionize gaseous atoms in the field. Subsequent collisions with other gaseous atoms
causes further ionization and so on, so that the plasma becomes self-sustaining. This occurs almost
instantaneously. The magnetic field causes the ions and electrons to flow in the horizontal plane of the
coil, thereby heating the neutral argon by collisional energy exchange, and a hot fireball is produced.
The hottest part of the ICP has a temperature between 8000.

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