Derived alkalinity

A method for deriving an alkalinity measurement, comprising:

• introducing, in a reaction chamber of an analyzer, a fluid sample comprising inorganic carbon, wherein the reaction chamber includes an electrochemical cell and wherein the electrochemical cell comprises an SP3 substituted carbon electrode doped with a conductivity elevating composition;
• measuring, using a phosphate analyzer of the analyzer, a phosphate amount of the fluid sample using a colorimetric reagent;
• measuring, using a pH sensor of the analyzer, a pH of the fluid sample, wherein the pH of the fluid sample correlates to a hydroxide amount of the fluid sample;
• introducing an acid reagent to convert the inorganic carbon to an amount of carbon dioxide, wherein the inorganic carbon comprises carbonate and bicarbonate;
• applying, using a generator of the analyzer, a positive potential to the SP3 substituted carbon electrode, the positive potential being sufficient to oxidize organics in the fluid sample to produce carbonate and partially oxidized organics;
• introducing, during the application of the positive potential to the SP3 substituted carbon electrode and in the reaction chamber, the acid reagent converting the carbonate and the partially oxidized organics to another amount of carbon dioxide;
• determining total organic carbon by detecting, using a metallic catalyst in the presence of the acid reagent and at least one detector of the analyzer, the another amount of carbon dioxide produced by the oxidation;
• and
• determining a derived alkalinity based upon the phosphate amount, the hydroxide amount, and the amount of carbon dioxide generated from the inorganic carbon, wherein the determining total organic carbon and determining the derived alkalinity occur simultaneously from the fluid sample in the same reaction chamber.