The Publishing House Medical Biophysics of the Romanianacademy a Case Study of Conductivity in Mineral Water

Conductometry studies evidenced non-ideal electrolyte solution properties of mineral waters. They classified themselves in two groups with an intermediate domain between. Keia is a high purity water at the junction of the two main groups. It shows the highest concentration in Ca – thus the main charge carrier – followed by Mg, Na and SO4 . Low HCO3 – results in a pH slightly more alkaline than blood plasma. Although formation of ionic associations (Ca2+SO4 , Mg2+SO4 ) limit the DebyeHuckel theory, the Davies plot shows two straight lines, with Keia at their intersection. A histogram of ionic strength is irregular, and Keia is placed towards lower values, pointing to large limits of the intermediate group. The histogram of measured conductivity supports a Gaussian fit, with Keia placed within the (mean ± SD) interval, hosting ~67 % of the mineral waters; they may show thus similar charge transport mechanisms. For Debye radius fit attempts of the histogram failed, and Keia was close to the mean value. Outside the corresponding volume of Debye spheres the water molecules interact by hydrogen bonds forming clusters, as sustained also by the mean value of the ordering, kosmotropic, total Ca+Mg ions. The possible role of water clusters in homeopathy is discussed.