Summary for copper content detection Discussion
Copper content detection in ferric chloride etchant was the question, with Heeranraj Mohabirsingh asking for any practical method, especially a colorimetric or conductivity approach, to measure copper buildup during the etching process. The thread excerpt provided here contains only the question and no visible answers, so no specific method is confirmed in the source. Based on the request alone, the need is for a way to monitor copper concentration in spent or in-use ferric chloride, likely to track etchant exhaustion or process control. Because no respondent advice appears in the excerpt, the page does not establish whether colorimetry, conductivity, or another analytical method is preferred. Any conclusion should therefore be treated as an open request rather than a resolved recommendation.
Q. I will be very grateful to the person who can give me an idea about how to detect the amount of copper content in a ferric chloride
⇦ on
eBay or
Amazon [affil link] Solution used for an etching process. Any detection method will be fruitful to my investigation but if someone knows about a colorimetric way or a conductivity method then it will be the apogee. Thanks in advance for any help.
Heeranraj Mohabirsingh
– Mauritius
2002
A. I would suggest a titration where you titrate with a standard solution of something that will precipitate the copper out without precipitating out anything else (for example the iron). Then you can follow the titration using a Redox electrode and look for the inflection point. Obviously atomic absorption ⇨
and ICP
⇦ on
[affil link]
work very well but are quite expensive.
Terry Tomt
– Auburn, Washington