Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Cyanide spot-test reagents
are there any solutions/reagents that can be applied to a silver plated component to spot-check for cyanide residues on the surface of the metal after plating?
Nigel GillAdvanced Technologist - Chemistry & Materilas - Glasgow, Scotland
March 7, 2008
March 29, 2008
Sure. Wash whatever it is with a small volume of 0.1N NaOH
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solution, then spot test the liquid with a Hach "Cyaniver" chemistry kit, or pyridine/barbituric acid reagent.
If you are having a problem with cyanide in your wastewater and you're not using any cyanide, and are thinking that it is coming in on parts from your supplier, good luck; but every time, without exception, that I have conducted such a test I have gotten a dead negative result.
Dave Wichern
Consultant - The Bronx, New York
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