We have been working with the EPA in an effort to get the new ASTM cyanide methods approved for NPDES reporting. We have updated ASTM D2036 to include ion chromatography and FIA gas difussion amperometry as determinative steps. We have also included ASTM D7284. D7284 determines cyanide by FIA gas diffusion amperometry following small scale distillation. Of course, ASTM D7511 is included as well.

Much work has been done on the Table of approved inorganic methods to try and make it more readable, and also ofn Part 136.6. Part 136.6 is “method flexibility” and the part has been expanded to include example situations of what is allowed.