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Analytical Method: Sulfate in disposal drainage water

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. 114548  Spectroquant® Sulfate Cell Test
Cat.No. 100617  Spectroquant® Sulfate Cell Test*
Cat.No. 114564  Spectroquant® Sulfate Cell Test
Cat.No. 114791  Spectroquant® Sulfate Test*
Cat.No. 116754  Water for analysis
Charcoal activated for soil tests
Membrane filter with 0.45 μm pore diameter
     
*not compatible with Move 100
    
Sample preparation - total content:
First filter the sample through a folded filter until clear. If necessary, filter through an membrane filter. As a rule, samples must be diluted with water for analysis due to the often high concentration of sulfate present. If the sample is strongly colored, mix 100 ml with 5 g activated charcoal for soil analysis, stir, filter off the charcoal and, if necessary, filter through a membrane filter. In such a case, treatment with activated charcoal should be taken into account when preparing the blank!
 
Analysis:
Determine with the above mentioned test kits.
 
Calculation:
Sulfate content in SO4 = analysis value in mg/l SO4
This result should be multiplied by the dilution factor if the sample has been diluted with water for analysis.
 
Procedural comparison:
2 seepage water samples taken from an industrial landfill were analysed according to procedure DIN 38405 D5-2 and the above procedure. The following results were obtained in mg/l:

 

Sample DIN 38405 D5-2 SQ-CT 114548 SQ 114791
1 17400 18600 19800
2 9100 7000 10200

 

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