In addition, the following determinations for soil are performed. Inorganic constituents in water, soil and animal tissue are determined by a variety of techniques at the Region 9 Laboratory. After applying one of several digestion techniques to a sample, the digested sample is introduced into the ICP which is capable of measuring up to 24 inorganic elements simultaneously. After applying one of several digestion techniques to a sample, the digested sample is introduced into the GFAA system which measures a single element at a time. Concentrations are usually in the sub ppb range.
Detection limits are typically well below the ppb level.
Colorimetry - After proper preparation of environmental samples, cyanide and hexavalent chromium are determined by colorimetric techniques. The Region 9 Laboratory uses several gas chromatographs equipped with different selective detectors to measure a variety of organic chemical constituents in environmental samples. The Region 9 Laboratory is committed to keeping up with the evolving needs of our clients. In this regard, the following projects are currently under development. The latest instrumentation for analysis of ppt levels of Mercury is also in the future.