METHOD FOR DETERMINING THE HARDNESS OF NATURAL WATERS Russian patent published in 2018 - IPC G01N33/18 

FIELD: chemistry; physics.

SUBSTANCE: invention relates to physical and chemical analysis methods for natural waters analyzing. Method for determining the hardness of natural waters includes the steps of determining the concentration of mg⋅eq/l of ions Ca²⁺, Mg²⁺, while the process of determining the concentration of calcium and magnesium ions provides for the measurement of the electrical conductivity from 3 to 20 mcA/cm³ highly diluted natural waters with a content of calcium and magnesium ions is less than 0.3 mg⋅eq/l using a calibration graph, from which the concentration of calcium and magnesium ions is read by the numerical value of the electrical conductivity of natural waters.

EFFECT: increased accuracy, elimination of the use of chemical reagents, significant acceleration and simplification of the determination of the concentration of Ca²⁺, Mg²⁺ ions in natural waters.

1 cl, 3 dwg