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Nickel sulfamate plating bath chemical analysis

Q. I am a semi-retired analytical/physical chemist doing volunteer work at the Alabama A&M Research Institute. I am attempting to analyze a nickel sulfamate plating bath by voltammetry and would appreciate any information on where I might find methods of analysis for metals plating baths by voltammetry.

Thank you for any help.

Hollis Bowman
Alabama A&M Research Institute - Hazel Green, Alabama
2004

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A. My first thought was that the concentration is far too high for decent results if your definition of voltammetry is the same as mine. This is not a common method to use for bath analysis. You might contact the manufacturer of the instrument tech services to see if they have an established procedure. A second thought would be to contact the international nickel institute. James Watts - Navarre, Florida 2004 A. I would try reading up on products from a company we have purchased many excellent products for our plating analysis namely Metrohm...who supply just the sort of apparatus you might be looking for. Nigel Gill, B.Sc MIMF MRSC - Glasgow, Scotland 2004

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2004

 Dear Readers,

I would like to thank very much those who responded to my e-mail questions regarding Watts plating bath voltammetry. After addressing the points you made I was able to find several sources of good information on the Internet. These include: finishing.com, princetonappliedresearch.com, metrohm.com, and circuitree.com.

After reviewing applications and application notes, I:

1. Diluted the plating bath solution 1/100 to 1/1000.

2. Instrument: Bioanalytical Systems, Inc. CV50W Cyclic Voltammeter with Controlled Growth Mercury Electrode (CGME).

3. Method: Osteryoung Square Wave Voltammetry.

4. Initial E: -750 mV, Final E: -1250 mV.

5. Standards: 1000 ppm Ni and Co spectroscopic standards diluted to 5 and 10 ppm.

After considerable manipulation I obtained an analyte and supporting electrolyte concentration to give an acceptable Ni and Co spectrum (voltammogram).

Again, thanks for pointing me in the right direction.

Sincerely,

Hollis Bowman [returning]
chemist/consultant - Hazel Green, Alabama

adv.  

"The Sulfamate Nickel How-To Guide"

by David Crotty, PhD
& Robert Probert

published Oct. 2018
$89 plus shipping