Principle

Total Alkalinity is a titration test.

The Indian Standard for drinking water holds that the acceptable limit is 200 mg/l, but in the absence of any other toxic substances or alternate source, this is relaxable upto 600 mg/l.

Calibration

No calibration is needed for this test.

Test

Total Alkalinity is the sum of P and T Alkalinity.

P - Alkalinity

  • Take 10 ml of sample in a measuring tube, and add 3 drops of P-Alkalinity Reagent A.
  • If the solution turns pink, titrate it with P-Alkalinity Titrant by adding drops and keeping count of the number of drops till the colour changes from pink to colourless.
  • If the solution does not turn pink P-Alkalinty is 0.
  • On the app, go to Titration Test > Total Alkalinity and enter the number of drops in the first textfield.
  • This should give you the result in mg/l.

T - Alkalinity

  • To the same measuring tube add 3 drops of T-Alkalinity Reagent, The colour should change to blue.
  • Titrate it with T-Alkalinity Titrant till turns reddish by adding it dropwise. Keep count of the number of drops.
  • On the app, go to Titration Test > Total Alkalinity and enter the number of drops in the second textfield.
  • This should give you the result in mg/l.