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    ชุดทดสอบโครเมท Tube Test (0.1 – 4.0 mg/l CrO42-and 0.05 – 2.00 mg/l Cr(VI))

    NANOCOLOR® Chromate 5

    Photometric determination of chromate

    Photometric determination with diphenyl-carbazideIn acidic medium, chromate ions react with diphenylcarbazide (lyophilised in the tube test) to form a red-violet colour complex. Chromium(III) ions are not determined unless they are converted to Cr(VI) by silver-catalysed oxidation with ammonium peroxodisulphate-/sulphuric acid.

    Data and ordering information

    Cat. No. 985 024
    Type tube test 0-24
    Range 0.1 – 4.0 mg/l CrO42-
    0.05 – 2.00 mg/l Cr(VI)
    when using semi-micro cuvettes 50 mm
    (Cat. No. 919 50):
    0.01 – 1.00 mg/l CrO42-
    0.005 – 0.500 mg/l Cr(VI)
    Sufficient for 20 determinations
    Shelf life at least 2 years
    Sea water suitability yes

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