Alkalinity test kit HI-3811- Hanna Instruments Romania

Description

HI-3811 Alkalinity test kit – Hanna Instruments Romania

SIGNIFICANCE AND USE

Alkalinity is the quantitative capacity of a water sample to
neutralize an acid to a set pH. This measurement is very
important in determining the corrosive characteristics of water
due primarily to hydroxide, carbonate and bicarbonate ions.
Other sources of alkalinity can be from anions that can be
hydrolyzed such as phosphates, silicates, borates, fluoride and
salts of some organic acids. Alkalinity is critical in the treatments of drinking water, wastewater, boiler & cooling systems
and soils. The Hanna Alkalinity Test Kit makes monitoring
easy, quick and safe. The compact size gives the user the
versatility to use the kit anywhere. The design makes the kit
easy to handle and, except for HI 3811-0, practically
prevents accidental injury or damage due to spills. Note: mg/L is equivalent to ppm (parts per million).

CHEMICAL REACTION

• Alkalinity can be measured as Phenolphthalein Alkalinity
  and Total Alkalinity. The Phenolphtalein Alkalinity is determined by neutralizing the sample to a pH of 8.3 using a
  dilute hydrochloric acid solution, and a phenophthalein indicator. This process converts hydroxide ions to water, and
  carbonate ions to bicarbonate ions:– Since bicarbonate ions can be converted to carbonic acid with
  additional hydrochloric acid, the Phenophthalein Alkalinity
  measures total hydroxide ions, but only half of the bicarbonate contribution. To completely convert the carbonate ions,
  hydrochloric acid is added until the sample’s pH is 4.5:

  – This is known as Total Alkalinity

Specifications