Abstract: The behavior and conditions of extraction separation of Hg2+ from other metal ions in water-potassium bromide-n-propyl alcohol-ammonium sulphate system were studied.The results showed that the n-propyl alcohol-water solution could be well divided into two phases when ammonium sulphate was added.The associated complex HgBr2-4C3H7OH+22formed with C3H7OH+2 and HgBr2-4 could be completely extracted during this process.Hg2+ could be quantiatively separated from Fe2+,Ga3+,Rh3+,Ce3+ and Zn2+ by ext...