mschock Posted February 26, 2014 Share Posted February 26, 2014 We are modeling the solubility and speciation of metals released from drinking water/plumbing interactions. We directly analyze for total inorganic carbon in the water by coulometric titration. We also analyze what would be termed "titration alkalinity" to the carbonic acid equivalence point by sulfuric acid titration. Drinking waters can have weak acid contributions from such anions as aqueous ammonia, hypochlorite ion, or various phosphoric acid anions, depending on the pH of the water. So it would not be proper to assume this titration alkalinity to be the system parameter carbonate alkalinty. While there is an analyte for titration acidity in the system parameters, I don't see one for titration alkailnty. And while we can express the titration alkainitiy in many varied units, I don't know what the best way to input that analytical data would be. Must we define a complicated new analyte of our own? Directly inputting the total concentrations of the other weak acids and the analyzed TIC would likely be the most accurate. Can TIC be properly input using HCO3- as the analyte? Or do we define something else? Quote Link to comment Share on other sites More sharing options...
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