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Acidity, Alkalinity and inorganic cvarbon concentration

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  • Acidity, Alkalinity and inorganic cvarbon concentration

    Alkalinity represents the amount of carbonates in water. When I compare concentration of inorganic carbon measured by TOC-analyzer, to concentration of inorganic carbon calculated by multiplying alkalinity with 12.01, the results are in pretty good accordance with each other. But, when there is also acidity present, then the better correlation is achieved with adding the amount of acidity to alkalinity value before multiplying with 12.01. pH is around neutral (6.8)

    What is the basis of this? Why this adding acidity gives better estimation of inorganic carbon concentration than alkalinity alone?
    Last edited by gigi1971; 06-07-2018, 04:57 AM.
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