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    ชุดทดสอบคาร์บอเนต ฮาร์ดเนส (1drop=18 ppm.)

    VISOCOLOR® alpha Carbonate hardness
    Titrimetric determination of carbonate hardness

    The determination is preformed as titration with hydrochloric acid against a mixed indicator, which changes colour at pH 4.5. (Reaction principle analogous to APHA 2320, DIN EN ISO 9963-1 C23 & -2 C24)

    Data and ordering information
    REF 935 016
    Type titration test
    Range 1 drop = 1 °d (corresp. to 18 mg/l CaCO3)
    Sufficient for about 100 tests with an average hardness
    of 10 °d
    Shelf life at least 1.5 years
    Sea water suitability yes
    Detectable with PF-12 no

    Carbonate hardness is that portion of calcium and magnesium ions which are present as carbonate or hydrogen carbonate.


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