Analytical Method: Zinc (total) in effluents (Photometry, DIN decomposition)

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. 114566  Spectroquant® Zinc Cell Test
Cat.No. 100861  Spectroquant® Zinc Cell Test
Cat.No. 114832  Spectroquant® Zinc Test*
Cat.No. 100456  Nitric acid 65 % for analysis
Cat.No. 107209  Hydrogen peroxide 30 % (Perhydrol®) for analysis
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
*not compatible with Move 100
Sample preparation:
Place 25 ml sample in a 600-ml beaker along with 5 ml 65 % nitric acid and 5 ml Perhydrol®, mix and slowly evaporate, almost to dryness, on a heating plate. Dissolve the residue in water for analysis and transfer to a

25-ml volumetric flask. Measure the pH immediately using Universal indicator strips and adjust to pH 4 - 10 if necessary using 1 mol/l sodium hydroxide solution. Only now make up to the mark with water for analysis and mix.
Determine with the above mentioned test kits.
Zinc (total) content in mg/l Zn = analysis result in mg/l Zn


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