Page 54 - An Introduction to Analytical Atomic Spectrometry - L. Ebdon
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Figure 2.14
Background correction.
of slightly different wavelength. The field can be applied in a number of different ways. It may be
applied to either the source or the atom cell and in either a transverse (magnetic field and measurement
beam are 90° to each other) or a longitudinal (magnetic field and measurement beam are parallel)
configuration. In the simplest form of transverse Zeeman effect, the line appears as three components
(Fig. 2.17). The p component is situated at the 'normal' wavelength of the line, but the s and ss
+
-
components lie an equal distance on either side. The s components are linearly polarized
perpendicular to the magnetic field. If the field is strong enough, these components will lie outside the
atomic absorption profile and background can be corrected by measuring the absorbance of the p and s
components, respectively. In the longitudinal configuration, only the two shifted lines
