check this topic:

https://www.researchgate.net/post/How_to_determine_fluoride_content_in_PPM_level_quantitatively_in_33_HCl

regards,

G

I recall there is a UV-spectrophometric method mentioned in Standard Methods book which is easy to follow. Look out for the minimum detection limit of the method and if it serves your concentration range.

Grezegorz

Thank you so much for the link it did help

Unfortunately the answers were just electrodes and ion exchange

Dhurba

Wow that would be so interesting

can you please just give me any link for that procedure if possible because I tried to find a way for that book but couldn't, but basically as an ion it can't absorb in UV-vis unless there is another reagent giving color when bonded to fluoride ions

Hi Gabris,

Exactly, Fluoride ions are complexed and gives a color that increases in intensity with the concentration. The method is called SPADNS method. The method is fairly easy and simple to follow.

I found one document in the web

http://www.indiawrm.org/docs/HP2/MANUALS/Water%20Quality/5014/-download-manuals-WaterQuality-WQTraining-36MeasurementofFlu.pdf