Analytical Method: Aluminium (total) in lime stone

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. 100594  Spectroquant® Aluminium Cell Test
Cat.No. 114825  Spectroquant® Aluminium Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 106495  Sodium hydroxide for analysis
Cat.No. 116754  Water for analysis
Sample preparation:
In a nickel crucible mix about 100 mg of powdered sample material with 8 pellets of sodium hydroxide (1.5 g). Heat the covered crucible with a gas burner for 30 min to weak redness. After cooling dissolve the content of the crucible in water. For this purpose put the crucible with the cover into a beaker and heat with 30 - 50 ml water for analysis on the water bath, until the molten mass has dissolved. Ultra sonification accelerates the dissolution. Adjust the solution with hydrochloric acid 37 % to a pH - value of 3 - 4, transfer quantitatively into a 200-ml volumetric flask, fill up to volume with water for analysis and mix well.
Determine with the above mentioned test kits.

Aluminium (total) content in %  =   analysis value in mg/l Al x 20
weight of sample in mg





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