Summary for cyanide spot test Discussion
The thread asks for a spot test for cyanide in wastewater after ETP treatment. Ted Mooney’s page shows a brief answer from Pedro Franco, who says he uses a Macherey-Nagel rapid test called "Cyantesmo" and suggests looking into it. No other methods, limits, or cautions are discussed in the excerpt, so the practical takeaway is simply that a commercial rapid test kit is being recommended as a quick option for cyanide checking after treatment.
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Q. What is the spot test for cyanide after treatment in ETP
Rathin Mukhopadhyay
– Kolkata, West Bengal, India
December 12, 2024
A. Hi Rathin
I am not aware of a direct spot test for cyanide. However, there is such a thing as “cyanide amenable to chlorination”, which is the worst type of cyanide. And a spot test which is done constantly is the potassium iodide starch paper test; it doesn’t actually test for cyanide, but it tests for the availability of chlorine — the assumption being that if it is lightly purple there is a proper amount of chlorine so cyanide amenable to chlorination is not present.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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A. Hello, Rathin,
I use a Macherey-Nagel rapid test called “Cyantesmo”, give it a look ⇨
Regards,
Pedro Franco
Chemical Engineer – Nova Friburgo, Rio de Janeiro, Brazil