In order to test the specificity of TBDPSC towards fluoride, several anion solutions were prepared with standard concentrations of 5 mg/L that included Cl−, Br−, I−, NO3−, View the MathML sourceSO42− and CH3 COO−. 40 μL of 4% TBDPSC solution prepared in THF was then added to 1 mL of each of these solutions to check for interference from either of these compounds towards fluoride testing. The resulting fluorescence was then observed under a UV lamp