| Flame Emission Spectroscopy |
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This technique was pioneered by Robert Bunsen who designed the Bunsen Burner and Gustav Kirchoff who designed a suitable prism spectroscope. TECHNIQUE The solution containing the relevant substance to be analysed is drawn into the burner and dispersed into the flame as a fine spray. The solvent evaporates first, leaving finely divided Solid particles which move to hottest region of the flame where gaseous Atoms and Ions are produced. Here electrons are excited as described above. It is common for a Monochromator to be used to allow for easy detection. On a simple level, flame emission spectroscopy can be observed using just a Bunsen Burner and samples of metals. For example, Sodium metal placed in the flame will glow yellow, whilst Calcium metal particles will glow red. SEE ALSO |
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