The measurement and control of mercury (Hg) emissions from utility power plants continue to be the subjects of much study. In a programme funded by the Department of Energy, Physical Sciences Inc (PSI) has developed a Hg sorbent using a zoolite material with a proprietary agent for improved capture of elemental as well as oxidized Hg. Joseph P Morency Thomai Panagiotou & Constance L Senior present some promising laboratory results.