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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Spot test for cyanide in waste water

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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 very frequently is the potassium iodide starch paper test; it does not 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 prpbably not present.

Luck & Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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