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The HI84430 titrator is designed to determine both low and high range values of acidity in water. Water samples containing polyvalent cations (such as iron, aluminium, chromium, manganese, etc) may react slowly with the titrant, causing a drifting endpoint. It is necessary to add several drops of the HI84430-58 additional reagent solution (hydrogen peroxide) to such samples in order to increase the rate of hydrolysis of the metal ions present.
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