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Alkalinity Test Kits

A banner image showing the Alkalinity Titrets Kit packaging and contents

What is Alkalinity?

The alkalinity of water is a measurement of its buffering capacity or its ability to neutralize acid. Natural waters become alkaline through a combination of bicarbonate, carbonate, and hydroxide ions. This occurs naturally as water passes over rocks and picks up minerals. Sewage and wastewaters usually exhibit higher alkalinities than natural waters due to the presence of silicates and phosphates.

Why Test for Alkalinity?

Alkalinity is measured for different reasons depending on the industry. Alkalinity inhibits corrosion in boiler and cooling waters and can affect the amount of chemicals that need to be added to treat the system. Alkalinity measurement is also used as a means of controlling water and wastewater treatment processes or the quality of various process waters. Environmental monitoring groups utilize alkalinity to track the health of streams, lakes, and rivers.

About Our Test Kits

These test kits utilize CHEMetrics Titrets® ampoules. Titrets ampoules use a reverse titration technique to measure analyte concentration levels. This means that the titrant volume inside the ampoule is fixed while the sample volume is varied. After snapping the ampoule tip, sample is drawn into the test ampoule in small doses until a color change signals that the endpoint has been reached. The titration is stopped at the end point, and the liquid level in the ampoule corresponds to the concentration printed on a scale on the ampoule’s outer surface.

Click on a catalog number in the tables below for more information or to purchase a test kit.

Visual Kits

Range MDL Method Kit Catalog No. Refill Catalog No.
10-100 ppm as CaCO3 (Total) 10 ppm Acid Titrant with pH Indicator K-9810
50-500 ppm as CaCO3 (Total) 50 ppm Acid Titrant with pH Indicator K-9815
100-1000 ppm as CaCO3 (Total) 100 ppm Acid Titrant with pH Indicator K-9820

Methods

Alkalinity (total)

References: ASTM D 1067-06, Acidity or Alkalinity of Water, Test Method B. APHA Standard Methods, 23rd ed., Method 2320 B – 1997. USEPA Methods for Chemical Analysis of Water and Wastes, Method 310.1 (1983).

CHEMetrics’ total water alkalinity test kits determine total or M alkalinity using a hydrochloric acid titrant and a bromocresol green/methyl red indicator. The end point of the titration occurs at pH 4.5. Results are expressed as ppm (mg/L) CaCO3.