Abstract
The concentrations alkaline-earth metal ions in water solutions were determined by the method of emission actinometry of atmospheric pressure discharge plasma with a liquid cathode. The rubidium atoms were the actinometer component in plasma, whose cations with a known concentration were added to the analyzed solution. The solutions of magnesium, calcium, barium with concentrations of 10−6-10−4 gl−1 were analyzed. It is established that the addition of electrolytes in the solution influence on the emission intensity of the metal atom lines. However, the use of the ratio of the intensities of the radiation of the analyzed components and the component-actinometer can improve the accuracy of the analysis. The water hardness factor of the tap water was determined using this method.
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