ASTM D7365 is a Standard Practice that includes mitigation of interferences for cyanide methods. Numerous operators have reported interferences that seem to be related to high concentrations of surfactants (visible foam). Surfactants can interfere during cyanide distillations and also interfere with gas diffusion. D7365 needs to mention this interference and possible solutions.
Keywordsavailable cyanide; cyanide; free cyanide; hydrogen cyanide; interference; preservative; sample collection; total cyanide; Cyanides; Interferences; Preservation; Sampling; Water sampling;
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