The traditional methods for measuring mercury are cold-vapor atomic absorption spectroscopy (CVAAS) and inductively-coupled plasma mass spectrometry (ICP-MS) [5,6]. These methods are accepted as reliable and sensitive; however, throughput of samples is slow, with high equipment and reagent costs. The samples are exposed to concentrated acids and extended heating, which increase analyte loss [7]. Thermal Decomposition- Amalgamation/Atomic Absorption Spectrophotometry (TDA/AAS) is an emerging technique for rapidly testing