Analytical Method: Iron in industrial 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. 114549  Spectroquant® Iron Cell Test
Cat.No. 114896  Spectroquant® Iron Cell Test*
Cat.No. 114761  Spectroquant® Iron Test
Cat.No. 114761  Spectroquant® Iron Test
Cat.No. 100796  Spectroquant® Iron Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 109137  Sodium hydroxide solution 1 mol/l for analysis
Cat.No. 109531  MColorpHastTM pH-indicator strips pH 0 - 6
Cat.No. 116754  Water for analysis
   
*not compatible with Move 100
   
No preliminary treatment is necessary for iron determinations in drinking waters. Boiler and industrial waters must be mineralized with hydrochloric acid.
 
Sample preparation:
In a glass beaker mix 25 ml of the sample liquid with 5 ml of hydrochloric acid 37 %, evaporate slowly to near dryness, on the heating plate. Dissolve the residue in water for analysis and transfer to a 25-ml volumetric flask.
Before filling up to the volume, check the pH of the liquid, by using pH-indicator strips. The optimum range is pH 2 - 4; if necessary, adjust by using sodium hydroxide solution 1 mol/l. After this fill up to the mark with water for analysis and mix well.
 
Analysis:
Determine with the above mentioned test kits.
 
Calculation:
Iron content in mg/l Fe = analysis value in mg/l Fe

 

Materials

     
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