What does the mean of m alkalinity and p alkalinity water?
1. M-Alkalinity (also known as Total Alkalinity) measures the
amount of carbonate, bicarbonate and hydroxide present in terms of
"ppm as calcium carbonate". ( M-Alkalinity measurement is based on
a sulphuric acid titration using a Methyl orange indicator that
goes from yellow at a pH of 4.5 to orange at pH of 4.4 at the
endpoint.) 2. P-Alkalinity measures the amount of carbonate and
hydroxyl alkalinity present in terms of "ppm as calcium carbonate".
P-alkalinity is measured down to a pH of 8.3. The M-alkalinity is
measured down to a pH of 4.3.