Analytical Method: Iron (total) in mineral oil

Instrumens 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. 114761  Spectroquant® Iron Test
Cat.No. 100796  Spectroquant® Iron Test
Cat.No. 100317  Hydrochloric acid 37 % for analysis
Cat.No. 101201  Ammonium peroxodisulfate for analysis
Cat.No. 116754  Water for analysis
Carbon tetrachloride for analysis
Sample preparation:
Place 1 ml of the ferrocene-containing mineral oil in a 100-ml Erlenmeyer flask, add 20 ml carbon tetrachloride, 15 ml hydrochloric acid and 1 g ammonium peroxodisulfate and mix well. Boil the mixture for 1 hour under reflux whilst stirring vigorously (necessary: heatable magnetic stirrer).
Allow to cool, transfer to a separating funnel, separate the aqueous phase and transfer it to a 1-l volumetric flask. Wash the organic phase twice with 10 ml water for analysis and transfer this water also to the volumetric flask. Make up to the mark with water for analysis and mix well.
To carry out the analysis, remove 5 ml, place in a 50-ml volumetric flask and make up to the mark with water for analysis.
Determine with the above mentioned test kits.
Iron (total) content in g/l Fe = analysis value in mg/l Fe x 10
Literature reference:
Chemical Abstracts Vol. 65, 2955e


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