Coherent forward scattering atomic spectrometry

In a system for coherent forward scattering, the radiation of a primary source is led through the atom reservoir (a flame or a furnace), across which a magnetic field is applied. When the atom reservoir is placed between crossed polarizers scattered signals for the atomic species occur on a zero-background. When a line source such as a hollow cathode lamp or a laser is used, determinations of the respective elements can be performed. In the case of a continuous source, such as a xenon lamp, and a multichannel spectrometer simultaneous multielement determinations can also be performed. The method is known as coherent forward scattering atomic spectrometry [309, 310]. This approach has become particularly interesting since flexible multichannel diode array spectrometers have became available. 

Coherent forward scattering atomic spectrometry is a multielement method. The instrumentation required is simple and consists of the same components as a Zeeman AAS spectrometer. As the spectra contain only a few resonance lines, a spectrometer with low spectral resolution is sufficient. The detection limits depend considerably on the primary source and on the atomizer. With a xenon lamp as primary source, multielement determinations can be performed, but the power of detection is low as the spectral radiances are low compared with those of a hollow cathode lamp. By using high-intensity laser sources, the intensities of the signals and the power of detection can be considerably improved. When furnaces are used as atomizers, typical detection limits in the case of a xenon arc are Cd 4 ng pb 0.9 T1 1.5 Fe 2.5 and Zn 50 ng [ 188]. These are considerably higher than in furnace AAS. 

ESCA electron spectroscopy for chemical analysis (X-ray photoelectron spectroscopy) ESI electrospray ionization ET-AAS (Also denoted GFAAS, EAAS, EA-AAS, ETAAS, ETA-AAS) electrothermal atomization atomic absorption spectrometry ETA-CFS electrothermal atomization -coherent forward scattering (atomic magneto-optic rotation) spectrometry ETAES electrothermal atomization atomic emission spectrometry ETAES electrothermal atomization atomic fluorescence spectrometry ETA-LEI electrothermal atomization -laser enhanced ionization spectrometry... 

Coherent forward scattering (CFS) atomic spectrometry is a multi-element method. The instrumentation required is simple and consists of the same components as a... 

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