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Analytical Method: Chromium (total) in ceramic material

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. 114552  Spectroquant® Chromium Cell Test
Cat.No. 114758  Spectroquant® Chromium Test
Cat.No. 105865  Magnesium oxide for analysis
Cat.No. 106391  Sodium carbonate anhydrous for analysis
Cat.No. 100983  Ethanol for analysis
Cat.No. 116754  Water for analysis
Folded filter
 
Sample preparation:

Mix 1000 mg of very finely powdered sampling material with 1.5 g magnesium oxide and 5 g sodium carbonate and heat at 900 °C for about 30 minutes. Moist the cooled sinter cake with a little water for analysis, pulverise and transfer into a 150-ml glass beaker, with 50 ml of water for analysis and 1 drop of ethanol.
Heat the mixture on the steambath for 30 minutes, cool to room temperature and filter through a folded filter into a 100-ml standard volumetric flask. Fill up to volume with water for analysis and mix well.
 
Analysis:
Determine with the above mentioned test kits.
 
Calculation:

Chromium (total) content in % =   analysis value in mg/l Cr x 10
weight of sample in mg

 

 

 

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