A method for determining thiocyanate in cyanide residue has been developed.Through experiment on test conditions,it was determined that a 0.8%sodium hydroxide solution should be used as the leaching agent,with the leaching process involving ultrasonic extraction for 5 min followed by heating on a hot plate at 180℃ for 1 h.Thio-cyanate was then measured using the ferric salt colorimetric method.The relative standard deviation of this method ranged from 0.12%to 0.93%,with spiked sample recovery rates between 95.46%and 100.50%.This method has been widely applied for the determination of thiocyanate in cyanide residue within the gold industry.
关键词
氰渣/硫氰酸盐/浸提剂/铁盐比色法/浸提方式
Key words
cyanide residue/thiocyanate/leaching agent/ferric salt colorimetric method/leaching method
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