Figure 2 A photograph of the label on a bottle of water. At the top it says 'Typical analysis'.
Calcium 55, Magnesium 19, Potassium 1, Sodium 24, Bicarbonate 248, Chloride 37, Sulphate 13, Nitrate < 0.1, Iron 0, Aluminium 0, Dry residue at 180 degrees C 280, Natural mineral water 500 ml, pH at source 7.4.