title: Direct measurement of less than 1 part-per-billion fluoride in rain, fog, and aerosols with an ion-selective electrode.
mesh_terms: D000336:Aerosols; D004566:Electrodes; D005069:Evaluation Studies as Topic; D005459:Fluorides / Q000032:analysis*; D008722:Methods; D008832:Microchemistry; D014877:Water Pollution, Chemical / Q000032:analysis*; D014887:Weather
chemical_list: D000336:Aerosols; D005459:Fluorides