Analytical Method: Manganese (total) in effluents

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. 109137 Sodium hydroxide solution 1 mol/l
Cat.No. 109535 MColorpHast^TM Universal Indicator strips pH 0 - 14
Cat.No. 116754 Water for analysis

Sample preparation:

In a glass beaker mix 25 mL of sample solution with 5 mL hydrochloric acid 37 % and evaporate almost to dryness on the heating plate. Dissolve the residue in water for analysis and transfer to a 25-mL volumetric flask.
Whilst there is still room in the flask, check the pH with Universal Indicator strips. The ideal range is pH 3 - 10; if necessary adjust the pH with sodium hydroxide solution 1 mol/l. Immediately after, fill up the solution to the mark with water for analysis and mix well.

Analysis:

Determine with the above mentioned test kits.

Calculation:

Manganese (total) content in mg/l Mn = analysis value in mg/l Mn