Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Analytical Method: Manganese (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. 100816  Spectroquant® Manganese Cell Test
Cat.No. 114770  Spectroquant® Manganese Test
Cat.No. 101846  Spectroquant® Manganese Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 100456  Nitric acid 65 % for analysis
Cat.No. 116754  Water for analysis
Ascorbic acid for analysis
 
Sample preparation:
In a covered beaker dissolve about 100 mg of sample in 7 ml hydrochloric acid 37 % and 3 ml nitric acid 65 %, on a steambath. After complete solution, evaporate the acids to a fully dry, acid - free crystalline residue. This should be yellow or greenish in color (not dark - brown or black).
Add a few ml of water for analysis and transfer this solution to a 1000-ml standard volumetric flask containing
2.5 g of ascorbic acid. Fill up to the mark and mix well.
 
Analysis:
Determine with the above mentioned test kits.
 
Calculation:

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


 

Materials

     
Related Links

Categories