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    กระดาษทดสอบ Chromium, chromate (Chromium test paper)

    Chromium test paper

    Quick and easy determination of chromate

    This test paper 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.

    Product data and ordering information

    Type Qualitative test paper
    Presentation  Pack of 200 strips 20×70 mm
    Color reaction white to violet
    Limit of sensitivity 2 mg/l Cr3+ or 5 mg/l CrO42–
    Reference 907 24

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