ION BALANCE CALCULATION
The ion balance is used to check analytical
results. Total anions must be in balance with total cations.
Therefore the sum of the concentrations of anions should equal the total
concentration of cations and the ratio of total
anions to total cations should be 1. The
concentrations in this case must be in terms of ion equivalents. The graphical
representation of ion equivalent concentrations helps you to visualise the
characteristics of the water in terms of its principal dissolved salts.
Enter the concentrations in milligrammes per litre (mg/l) of the common ions calcium, magnesium, potassium, sodium, alkalinity (bicarbonate), sulphate, chloride and nitrate in your sample. You will need to select the appropriate units for alkalinity. Then press "Assess". If the balance is poor either the analysis is inaccurate or there is at least one other important ion. Repeat as required. To see a listing of your assessments press "Summary".