Analysis of Cyanide (Total, Weak Acid Dissociable, and ...

i. Oxidized products of sulfide rapidly convert cyanide to thiocyanate, especially at high pH (APHA). Therefore, if sulfides are present at time of NaOH preservation, free cyanide may not be detected by the method. ii. Hydrogen sulfide distills or is transmitted via gas diffusion with cyanide, and ................
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