Letter 39038

Measure free fluoride ions concentration without adding any buffer or ph collecting solutions [India] 

January 11, 2006

Dear Sir,
We are developing fluoride ion measuring system , free acid and total acidity of the phosphating bath in painting shop of automobiles manufacturing plant. Free fluoride ions are required for better metal finishing having aluminium alloy in the metallic surface . This is usually done in acidic solution having pH between 3.5 and 3.6. Measurement of fluoride by specific ion electrode method requires the pH in the range of 5-8 for better metal finishing it is necessary to keep the pH of the bath solution between 3.4- 3.5 pH . SPE manufacturers advice measurement as stated above.

Generally people prefer to measure free fluoride ions concentration without adding any buffer or ph collecting solutions. We wish to know how it is done and where can we get the reference for it?

Thanks with best regards,

K N Kudale
- Pune, Maharashtra, India

I want to answer or follow-up on this subject publicly (in non-commercial fashion).

 

My company is a supporting advertiser at finishing.com and we want the contact information to reach the inquirer privately.

 

I want to post a new question or inquiry of my own on a different subject.