Accurately measuring cyanide available for leaching gold from ores containing copper and metallic sulphides is problematic, since copper complexes with cyanide and reduces the amount of cyanide available for leaching. Xylem’s Ol Analytical CNSolution 9310 On-line Cyanide Analyzer measures available cyanide in precious metal leaching solutions per U.S. EPA Method OIA-1677 and ASTM D 6888-09. The gas-diffusion amperometry technique is free of interferences from copper and metallic suphides, providing a more accurate measurement of the available cyanide concentration. The analyzer also responds to zinc, copper, cadmium and silver cyanide complexes in the range of 0.2 to 2,000 ppm. Xylem Inc.
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