(1) Sodium Chloride grade (AR) NaCl (M.Wt. = 58.44
g/mol, 99.8% purity) supplied by QReCTM.
(2) Potassium Sulphate K2SO4 (M.Wt. = 174.25 g/mol,
99% purity) supplied by BHD chemicals Ltd Pool
England.
(3) Magnesium Chloride MgCl2.6H2O (M.Wt. = 203.30
g/mol, 98% purity) supplied by R&M Chemicals.