Analytical Method: Silicon (total) in steels

Instruments and Reagents:

Cat.No. 173016  Spectroquant® VIS Spectrophotometer Prove 100 or

Cat.No. 173017  Spectroquant® UV/VIS Spectrophotometer Prove 300 or

Cat.No. 173018  Spectroquant® UV/VIS Spectrophotometer Prove 600 or

Cat.No. 109748  Spectroquant® Photometer NOVA 30 or

Cat.No. 109751  Spectroquant® Photometer NOVA 60 or

Cat.No. 173632  Spectroquant® Colorimeter Move 100

Cat.No. 114946  Rectangular cells 10 mm and/or

Cat.No. 114947  Rectangular cells 20 mm and/or

Cat.No. 114944  Rectangular cells 50 mm
Cat.No. 114794  Spectroquant® Silicate (Silicic Acid) Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 100456  Nitric acid 65 % for analysis
Cat.No. 101164  Ammonium fluoride for analysis
Cat.No. 116754  Water for analysis
Sample preparation:
In a well covered glass beaker dissolve about 100 mg of sample in 3 ml hydrochloric acid 37 % and 3 ml nitric acid 65 % on the steambath. When completely dissolved, evaporate the acids, to a well-dried, acid-free, crystalline solid residue.
After taking up into a few ml of water for analysis, transfer the solution to a 1000-ml volumetric flask, fill to the mark with water for analysis and mix well.
Transfer this solution immediately to a polyethylene flask, into which about 0.2 g of ammonium fluoride has been put. Dissolve the salt completely and mix the solution well. After a waiting period of 15 minutes analyse the material.
Determine with the above mentioned test kit.

Silicon (total) content in %  =   analysis value in mg/l Si x 100
weight of sample in mg





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