Photo spectrometer
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Photo spectrometer |
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 Mr.
Jürgen Nolte was at the exhibition in Essen Germany at the stall
of Spectro Analytical Instruments. He was the main person
available for price negotiations. Mr. Jaffer in the capacity of
consultant along with Mr. Al Nasir Shakoor Director of Japan
Metal Industries visited the exhibition near Düsseldorf .Mr. Al Nasir was on a buying trip to Europe. Japan Metal industries has purchased and installed a photo spectrometer at their factory in Karachi. This instrument is capable of analyzing alloy aluminium and can give about 17 elements with an accuracy of three decimal places. This is an essential requirement of any foundry which wishes to stick to best performance. The working principal on which the instrument functions is as follows. An electrical arc is formed between the electrode and the material to be tested in an absolutely inert atmosphere. The temperature of the arc causes the metal to turn into vapor. The molten vapor glows and emits light like any other burning material. Each burning metal has a specific and signature color band of emitted light. For example the sodium light very commonly used for the illumination of the roads and streets. It is orangish yellow and it the signature emitted light of the sodium vapor. The light produced by the glowing components of an aluminium alloy is passed through the diffraction grating. Diffraction grating is an advanced and sophisticated type of apparatus exactly behaving like a glass prism. The light out of prism breaks into seven colored lights, the light coming out of the grating is dispersed into different colored rays each color is specific and denotes an element. Each different ray out of the diffraction grating denotes an element. The computer in the spectrometer analyses these light rays of different colors and on the basis of the color and its intensity shows the type and the percentage of certain metal element. |
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Last modified: April 17th 2005