Analytical Method: Nickel (total) in pickling baths

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. 114554  Spectroquant® Nickel Cell Test
Cat.No. 114785  Spectroquant® Nickel Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 104944  Potassium chlorate
Cat.No. 109137  Sodium hydroxide solution 1 mol/l
Cat.No. 109535  MColorpHastTM Universal Indicator strips pH 0 - 14
Cat.No. 116754  Water for analysis
 
Sample preparation:
In a glass beaker mix 25 ml of the sample solution with 10 ml hydrochloric acid 37 % and 3 g potassium chlorate and evaporate cautiously (fume cupboard!) to a wettish residue on the heating plate. Dissolve the residue in water for analysis and transfer to a 25-ml standard volumetric flask. Check the pH of the mixture by means of Universal Indicator strips. The optimum pH range is 3 - 8, if necessary, adjust using sodium hydroxide solution
1 mol/l. When adjusted fill up to the final volume with water for analysis, and mix well.
 
Analysis:
Determine with the above mentioned test kits
 
Calculation:
Nickel (total) content in mg/l Ni = analysis value in mg/l Ni

Materials

     
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