No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

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

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Proper analytical method for free fluoride in acidic solution

We are analysing Trifluoroacetic acid ⇦ this on eBay or Amazon [affil links] which may contain H Fin ppm level, we have analysed HF by orion meter but the results are not reproducible please suggest a proper method to do so.

Thanks,

Mr. Swaran Singh
QC Incharge - Surat, Gujarat, INDIA
2003

I suspect that you are using an Orion 407 with their cheapest F electrode. It will do ok for pure solutions, but will not work very well for solutions containing other metal ions. There are more complex methods available that will give you repeatable results. The correct TISAB solution will be mandatory. Contact Thermo Orion tech services for some literature on the subject analysis.

James Watts
- Navarre, Florida
2003

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: