Analytical Method: Silicon (total) in ores and ceramic materials

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. 101164  Ammonium fluoride for analysis
Cat.No. 106495  Sodium hydroxide for analysis
Cat.No. 116754  Water for analysis
Sample preparation:
In a nickel crucible covered with a nickel plate heat about 100 mg of finely ground sample material at 650 °C for 30 minutes, with 8 pellets of sodium hydroxide. When the crucible is cold treat the contents with 10 ml of water for analysis and bring the melt-cake into suspension, with gentle warming.
Transfer the suspension, with water for analysis, into a 1000-ml standard volumetric flask, fill up to volume with water for analysis and mix well.
Transfer this solution immediately to a polyethylene flask, in which 0.2 g of ammonium fluoride has been put. Dissolve the salt completely and mix well. Analyse after a waiting period of 15 minutes.
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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