Alkalinity Test Kits

Titrimetric Kits

Range MDL Method Type Kit Cat. No. Refill
10 - 100 ppm as CaCO3 (Total) 10 ppm Acid Titrant with pH Indicator Titrets K-9810
50 - 500 ppm as CaCO3 (Total) 50 ppm Acid Titrant with pH Indicator Titrets K-9815
100 - 1,000 ppm as CaCO3 (Total) 100 ppm Acid Titrant with pH Indicator Titrets K-9820
100 - 1,000 ppm as NaOH (Hydrate) 100 ppm Acid Titrant with pH Indicator Titrets K-4710

CHEMetrics offers test kits employing industry standard pH indicators to deliver sensitivity and accuracy within minutes. Based on CHEMetrics patented Self-Filling Reagent Ampoule technology. Premixed. Premeasured. Precise. Each kit contains 30 tests.

Alkalinity (Total)

CHEMetrics' total alkalinity tests determine Total (T) Alkalinity using a hydrochloric acid titrant and a bromocresol green/methyl red indicator. The end point of the titration occurs at pH 4.5 whereupon the indicator colour changes from pink to bright green. Results are expressed as ppm (mg/l) CaCO3.

References:
ASTM D 1067-06, Acidity or Alkalinity of Water, Test Method B.
APHA Standard Methods, 22nd ed., Method 2320 B - 1997.
USEPA Methods for Chemical Analysis of Water and Wastes, Method 310.1 (1983).

Alkalinity (Hydrate)

For hydrate alkalinity, CHEMetrics developed a titrimetric method that uses a hydrochloric acid titrant with a phenolphthalein indicator. This hydrate alkalinity test provides a more accurate value than the calculation method. The end point of the titration occurs at pH 8.3 whereupon the indicator colour changes from colourless to a pale pink. Barium chloride is added to the sample to prevent interference from carbonate and bicarbonate alkalinity. Results are expressed as ppm (mg/l) NaOH.

The hydrate alkalinity test kit can also be used to measure Phenolpthalein (P) Alkalinity. When used in conjunction with one of the above Total Alkalinity test kits, calculation of the carbonate, bicarbonate and hydroxide alkalinity is possible. Please see the Alkalinity page for more information.

References:
Developed with Calgon Corporation.
APHA Standard Methods, 22nd ed., Method 2320 B - 1997.

Titrets Technology

CHEMetrics Titrets employ reverse titration technology, meaning that the premixed and premeasured acid titrant is in the ampoule, and the sample and indicator is drawn in a little at a time from the sample cup. The amount of sample required to neutralise the acid titrant is proportional to the alkalinity of the sample, which is shown on the scale on the side of the ampoule.

Applications

Alkalinity inhibits corrosion in cooling and boiler waters. Boiler operators must maintain relatively high hydrate alkalinity levels when phosphate cycle treatments are used to ensure the formation of softer, more easily removable deposits. Alkalinity is also measured as a means of controlling water and wastewater treatment processes or the quality of various process waters.


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