Chromium test paper (Box of 200 strips, 20 x 70mm)

• 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-