Method for determining thiocyanate in water containing iron-cyanogen complex in gold cyaniding process

• Main Authors: GE ZHONGYI, CHEN YONGHONG, WANG JU
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a method for determining thiocyanate in water containing an iron-cyanogen complex in a gold cyaniding process, and belongs to the technical field of thiocyanate determination.The method comprises the following steps: adjusting a sample solution to be acidic, adding 0.1 g of ferrous sulfate to form iron ferrocyanide precipitate, adjusting to be alkaline, adding 0.1 g of zinc sulfate to flocculate the precipitate, heating to boil for 20 minutes, taking down, cooling, fixing the volume to a 100mL volumetric flask, performing dry filtration, taking a proper volume of testsolution, and determining the content of thiocyanate by adopting an iron salt colorimetric method. Aiming at the water quality containing high-content ferricyanide complex, the invention successfullyfinds out a combined masking agent for masking the ferricyanide complex, finds out an organic solvent capable of inhibiting fading of thiocyanate, and solves the problem that thiocyanate in wastewater containing the ferricyani