Analytical Method: Boron in soils

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. 100826  Spectroquant® Boron Cell Test
Cat.No. 114839  Spectroquant® Boron Test*
Cat.No. 116754  Water for analysis
Cat.No. 100063  Acetic acid 100 % for analysis
Cat.No. 101188  Ammonium nitrate for analysis
Cat.No. 101164  Ammonium fluoride for analysis
Cat.No. 108418  Titriplex® III for analysis
Cat.No. 109964  Nitric acid 0.1 mol/l
Folded filter
    
*not compatible with Move 100
   
Extraction solution:
Dissolve 6 g acetic acid 100 % for analysis, 10 g ammonium nitrate for analysis, 0.28 g ammonium fluoride for analysis, 0.19 g Titriplex® III for analysis and 65 ml 0.1 M nitric acid with water for analysis in a 500-ml volumetric flask, mix and fill up to volume with water for analysis.
 
Sample preparation:
Place 20 g of dried and sieved sample of soil in a polyethylene bag (alternative to glass due to the B - content) with 40 ml extraction solution in a boiling water bath. After cooling, filter through a folded filter. If the filtrate is not clear, it should be re-filtered.
 
Analysis:
Determine with the above mentioned test kit.
 
Calculation:
Boron content in mg/kg B = analysis value in mg/l B x 2

Materials

     
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