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Pulsed excitation light source, analysis

Atomic fluorescence is an extremely sensitive technique for determination of elements in samples. We should reiterate that in atomic fluorescence an external Ught source is used to excite the analyte atoms. An ideal light source for AFS must be much more intense than ahoUow cathode lamp to achieve improvements in sensitivity. As a result, pulsed hollow cathode lamps and lasers are frequently used in AFS measurements. Excitation with alight source such as a hollow cathode lamp, which only emits radiation specific for the element of interest, makes AFS virtually completely free from spectral interferences. In addition, AFS is like AES in that a multi-element analysis can be achieved by putting several light sources around the atom cell, as discussed below. [Pg.59]

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Excitation light

Excitation light source

Excitation pulsed

Excitation sources

Exciting pulse

Light pulse

Light sources

Pulse excitation

Pulsed light

Pulsed light sources

Source analysis

Source pulsed

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