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 - the value of 3 - 4, transfer quantitatively into a 200-ml volumetric flask, fill up to volume with water for analysis and mix well.

Analysis:

Determine with the above-mentioned test kits.

Calculation:

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