microtest® Test Kit Specifications

microtest Alkalinity 10 p+m

Titrimetric Test for

p- and m-Alkalinity

1 drop = 10 mg/L CaCO3

Product Code601500
ContentsIndicator m, 6 mL
Indicator p, 6 mL
Titration Solution, 15 mL
Test Tube, 10 mL
Instructions for Use
Analytical MethodAcidimetric Titration: The water sample is titrated with hydrochloric acid to the pH of 8.2 against phenolphthalein and to the pH of 4.3 against a mixed pH indicator. Results are expressed as calcium carbonate CaCO3 (carbonate hardness).
Number of Tests50 – 80
InterferencesNone, when Alkalinity is caused only by hydroxide, carbonate and bicarbonate ions. Free chlorine can interfere by destroying the indicator.
Measuring RangeThe recommended measuring range is 20 to 200 mg/L (2 – 20 drops @ 10 mg/L) for 5 mL of sample volume. This range can be extended by taking a smaller or larger water sample. For a 2.5 mL sample the measuring range is 40 to 400 mg/L and for a 10 mL sample the range is 10 to 100 mg/L.
Shelf Life2 years
ApplicationsDetermination and monitoring of p- and m-alkalinity in industrial water treatment (boiler feed water).