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Product code: MX-12539
The HI84531-51 is a 120 mL bottle of acidic titrant solution that is used for high range (300 to 4000 mg/L as CaCO3) determination of alkalinity in water. Water alkalinity is an expression of a water's acid-neutralizing capacity and it is determined by titration with standard acidic solutions.
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The HI84531-51 is a 120 mL bottle of acidic titrant solution that is used for high range (300 to 4000 mg/L as CaCO3) determination of alkalinity in water. Water alkalinity is an expression of a water's acid-neutralizing capacity and it is determined by titration with standard acidic solutions. Alkalinity is an important parameter for control and treatment of potable water and wastewater because it indicates the buffering capacity of water, or the ability to resist a pH change. The ability to resist large swings in pH results primarily from the presence of bicarbonates and carbonates. A low water alkalinity signifies that the water is susceptible to pH change, while a high alkalinity indicates that water is able to resist a major change of pH. Alkalinity can be used to estimate levels of hardness or to determine the corrosive capacity of water. Alkalinity of surface water, quantified by mg/L as CaCO3or meq/L, may be caused by carbonates, bicarbonates, hydroxides, phosphates, borates, silicates, or organic acid salts. Conventionally, the water alkalinity is approximated as sum of components. Three types of alkalinities exist together to form total alkalinity (TA): TA = OH-+ CO32-+ HCO3- OH-= hydroxide alkalinity CO32-= carbonate alkalinity HCO3-= bicarbonate alkalinity TA = total alkalinity Different tests can be performed to determine the quantity of different alkalinities present. According to the Standard Methods of Water and Wastewater Analysis, there are two options to determine water alkalinity: Strong alkalinity determination by titration of the water sample with strong acid solution to 8.3 pH (known as phenolphthalein alkalinity), or Total alkalinity determination by titration of the water sample with strong acid solution to 4.5 pH (known as bromcresol green alkalinity).

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Our Aspiration Tube Set (HI900570) is compatible with our Karl Fischer Titration Systems (HI903 and HI933). The tubes are constructed of durable, chemically resistant PTFE and feature a light-blocking polyurethane outer sleeve. This includes PTFE titrant tubing, blue tubing protection, and the tube lock.