Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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Rhodanine Mixing (1 reply)

A
Angela
4 years ago
Angela 4 years ago

Our lab guy has asked about different types of rhodanine: apparently he found cheap stuff and expensive stuff. I thought that there was only one, but I never had to prepare it, myself.

An EPA procedure (https://www.epa.gov/sites/production/files/2015-12/documents/9014.pdf) calls for 20 mg of p-dimethylamino-benzal-rhodanine, C12H12N2OS2, in 100 mL of acetone.

Is this the typical rhodanine and mix formula for titrating free cyanide in leach circuit samples?

J
Jorge
4 years ago
Jorge 4 years ago
Like

It is correct, to determine free cyanide using silver nitrate titration, you can use rhodanine, It is common to use acetone to prepare the solution. Also, you can use potassium iodide. Both solutions are indicators.

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