Proposed ASTM standard WK38734, Test Method for the Determination of Particulate Fluorides and Hydrofluoric Acid Using Filter Sampling and Suppressed Ion Chromatography, will help prevent overexposure to hydrofluoric acid/hydrogen fluoride by workers. Targeting analytical laboratories and field industrial hygienists, standard can be used to measure airborne concentration of gaseous HF and particulate fluorides at levels "well above and below" applicable occupational exposure limits.