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topic 41485

How to analyze ammonium content in acid zinc plating?


A discussion started in 2006 but continuing through 2017

2006

Q. I am plating with the mixture of potassium-ammonium chloride in an acid zinc plating process.
I know how tho get the zinc and total chloride. now my question is: How do I analyze the bath in order to get the ammonia content?

Thanks! Saludos!

Guillermo Castorena G.
Jobshop - San Luis Potosí, México

2006

A. You need to perform a distillation. Find a procedure for total ammonia in environmental samples, and apply that to your plating bath. You'll have to dilute the sample massively, at least by a factor of 200. The ammonia in the distillate can be determined titrimetically.

All of this is not trivial, esp. if you have no distillation set up. You might be best off sending it out to a lab.

Good luck!

dave wichern
Dave Wichern
Consultant - The Bronx, New York


2006

A. Firstly, contact your brightener supplier. They should be able to provide this information. The two methods I know of are: distillation and spectrographic (using Nessler's Reagent).

Gene Packman
process supplier - Great Neck, New York


2006

thumbs up sign Thanks a lot!
Gracias!

Guillermo Castorena G. [returning]
- San Luis Potosí, México

2006

A. Also, this analysis can be done quite easily if you have Ion Chromatography equipment.

Terry Tomt
- Auburn, Washington



October 5, 2017 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Hi all, I have using potassium and ammonia bath. But I don't know how to analyze KCl and NH4Cl? Help me please. Thank you.

Lee William
Plating shop employee - Hochiminh,vietnam



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