• Allows the quick and easy detection of Chromate (CrO43-)
• Cr(III) ions must be converted to chromate prior to the detection
• For non-destructive testing of materials, apply a drop of acid solution (1 part hydrochloric acid 37 % + 4 parts hydrogen peroxide 3 %) to the degreased surface. After 10-30 seconds, add a drop sodiumhydroxyde (NaOH). Press the test paper onto the precipitate, then put it into diluted sulfuric acid. In the presence of chromium, a violet spot appears. With this procedure, Chromium contents >0,1% are safely detected
• Color reaction: white to violet
• Limit of sensitivity: 2 mg/l Cr3+ or 5 mg/l CrO42-
