The Hydra IIAA mercury analyzer, from Teledyne Leeman Labs, operates on the principle of cold vapor atomic absorption to provide the analyst with a 1 ppt detection limit as well as compatibility with an extremely wide range of sample matrices. The mercury analyzer can be converted to atomic fluorescence or direct analysis without digestion. Its high capacity autosampler, short analysis time, and over-range protection system make the Hydra IIAA a powerful laboratory productivity tool.