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plasma and the elements being examined is more efficient with inductively coupled plasma sources, the
power requirement is, nevertheless, considerably greater than that needed by the micro-wave torch,
which accounts to some extent for the latter's popularity.
Figure 6.13
A Diagram of the ICP Torch for the Atomic Emission Spectrometer
The spectrometer arrangement is very similar to that used with a microwave induced spectrometer and
is shown in Figure 6.14. Figure 6.14 depicts the emission spectrometer fitted with the older type of
diffraction grating optical system. Most modern ICP atomic emission spectrometers utilize a diode
array sensor that is far more compact but, depending on the number of diodes, may have somewhat less
optical resolution. Virtually any type of well-designed gas chromatograph can be fitted to the
spectrometer, using an appropriately heated transfer line
