Are there TLC stains that work with fluoride or with organofluor compounds? I have a fluorinated phosphonic acid that does not stain with conventional means. I did research in many of the known and available staining resources, but I did not find something reliable yet. KMnO4, Phosphomolybdic Acid (PMA) Stain and Cerium Molybdate Stain, p-anisaldehyde as well as Vanilla stain did appear not to work. Do you have experiences here? For me I was not able to see an unambiguously contrast to the background. Maybe there is also a protocol that decomposes an organofluor compound beforehand and makes fluoride visible on TLC? I performed many tests but nothing was really convincing until now. I know that a protocol for qualitative prove of F- uses chromic acid and the discoloration of alizarin dye - but this system is probably not applicable for TLCs.