Brochure: CNSolution™ Cyanide AnalyzersSource: OI Analytical
OI Analytical has been a leader in cyanide analysis instrumentation since 1990. Research supported by OI has made significant contributions to the science of cyanide analysis and the reliability of cyanide testing methods.
USEPA Method OIA 1677 for Available Cyanide was developed by OI Analytical in cooperation with the University of Nevada – Reno, Mackay School of Mines. The method was approved for NPDES reporting on December 30, 1999 and SDWA reporting on March 12, 2007.
The USEPA has acknowledged the distillation step used in some methods actually causes analytical interferences, stating; "If sulfite or thiosulfite are present there is no way to accurately determine cyanide if heat is applied". OI has helped develop new methods that mitigate interferences arising in the sampling, processing, and measurement steps of older methods. An example is ASTM D 7511-09e2 for Total Cyanide. This method is in the proposed Methods Update Rule (MUR) of new 40 CFR 136 Clean Water Act methods for regulatory compliance testing of NPDES wastewater samples.