[smyrali]

Hello I have calculated Total Alkalinty by a titration method used for fresh water.
(There were 2 end ponits one on ph=8.3 and one on ph=4.3)
In fresh water samples Total Alkalinity equals substantially with Carbon Alkalinity by this titration method. My problem is that I have measured also seawater samples. Does the calculated TA for these seawater samples include borate alkalinity or I can add to the calculated "Total alkalinity" the Borate Alaklinity?

[Borek]

I would say Total is Total - and includes all. But that's just logic.

[smyrali]

So if i want to calculate Carbon Alkalinity on seawater samples I must do this : Ac=Ta- Borate Alkalinity
and on fresh water samples : Ac=Ta. Correct?