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    ชุดทดสอบความกระด้างทั้งหมดของน้ำ (1drop =18 ppm.)

    VISOCOLOR® alpha Hardness (total)
    Titrimetric determination of total hardness

    Complexometric titration.
    Reaction bases in accordance with DIN 38406 E3 and DIN 38409 H6.

    Data and ordering information
    REF 935 042
    Type titrimetric test kit
    Range 1 drop = 1 °d (corresponds to 18 mg/l CaCO3)
    Sufficient for 100 tests with an average hardness of 10 °d
    Shelf life at least 1.5 years
    Sea water suitability yes, after dilution 1+29
    Detectable with PF-12 no

    The total hardness of water is based on its content of alkaline earth ions (calcium and magnesium ions). This content depends on the geological conditions the water encounters during its course and may vary widely. Knowledge of the total hardness is important for the use of water in industrial as well as municipal applications, e. g. in the household as wash water or as boiler feed water in industry.


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