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MATERIAL ANALYSIS/ SPECTRAL ANALYSIS

 

Our analysers have a spark stand (stationary) or a sparking probe (mobile) with a counter electrode. An electrical discharge is generated between this electrode and the sample to be analysed by means of an excitation generator. Material of the test sample is excited and brought into a gaseous state. The atoms of the elements present in the material are brought to a higher energy state. When returning to the normal state, they emit light at element-characteristic wavelengths. This light travels directly (stationary) or via optical fibre (mobile) into the inlet aperature of a spectrometer. There is a very narrow entrance slit (20 μm) through which the light falls onto the surface of a diffraction grating. This grating is a concave, 60 mm diameter aluminiumised disc which is scored 3600 times per millimetre. Due to the high number of scores on the grating, the impacting light is diffracted so much that it is broken down into individual wavelengths. Spectral lines are created on a focal plane. These lines are images of the light falling through the entrance slit. The entrance slit is imaged on the focal plane as often as light of different wavelengths has passed through it. A line spectrum is created.