Test Paper for Fluoride detection

Its a test paper kit for detection of Sodium fluoride from DMSO:Water(1:1) solvent mixture at ease. In addition fluoride recognition at ppm level from mouth rinser and toothpaste water solution has been successful. Significantly, detection of fluoride from fluorosis affected tooth and saliva samples by similar colorimetric changes is also successful.
One research paper has been published in Royal Society of Chemistry, 2015 containing the details regarding this novel research.

[@SkynetT800]

And where can I buy F solution? I'm trying to conduct an experiment to see if the research chemical I bought on eBay contains fluorine.

[@ppghosh]

pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra01720c#!divAbstract
RSC Adv., 2015,5, 27387-27392

[@falakpanjwani1017]

Floride in water??? Or in other solvent? ??

[@ppghosh]

water ofcourse

[@ppghosh]

I hope you are going to ask concentration, its ppm level indeed.