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Analytical techniques for aluminum etchants

I have samples of aluminum etchant consisting of phosphoric, nitric, acetic acid ⇦ on eBay or Amazon [affil links] s. I need to know analytical techniques to provide a good assay (up to 0.1 wt %) of the etchant used.

Other methods other than buying a book from Amazon.com is well appreciated by me.

Wong G [last name deleted for privacy by Editor]
electronic chemicals, etchants, photoresist remover - Singapore
2003

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May 31, 2008

Uhh . . . maybe borrow the book from a library or buy it from Barnes & Noble?   :-)

Hi, Wong. Sorry, but I don't understand the hostility that our responders have earned here by recommending particular procedures detailed in specific books or copyrighted specifications. It's a lot for you to tell a stranger that they must not just tell you exactly where to find the procedure, but that they must also take the time to retype that procedure for you, and acknowledge that they are violating international copyright laws in doing so (because it is certainly NOT "fair use" when you already admit that you have no intention of consulting the book or specification the procedure was taken from).

But there are some general answers to your question in letter 12735 and 27688; please see if they are of help to you.

I've never personally heard of an aluminum "etchant" consisting of phosphoric, nitric, and acetic acid s; but that composition is used in brite dip solutions. Are you sure you are trying to analyze an etching solution rather than a chemical brightening solution?

Good luck!

Regards,

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

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