Filter Media-Teflon

Teflon Uses Teflon Uses  In line collection point for pesticides and polyaromatic hydrocarbons(PAHs) Purpose Purpose  Collection of select contaminants  Serves as “capture” point of sampling train for later analysis

Filter Media-Teflon Pesticide sampling Pesticide sampling  Teflon has resistance to mild corrosive properties of some pesticides PAH sampling PAH sampling  Teflon can be used at high temperature ranges, making it applicable to a wide variety of PAH sampling situations

Filter Media-Teflon Operating parameters Operating parameters  Requires high-flow pump  47mm cassette filter holder  Pesticides(.2-1L/min)  PAHs(2L/min)

Filter Media-Teflon Method of analysis Method of analysis  Pesticides  Gas chromatography(GC)  Flame photometric detection(FPD)  PAHs  HPLC  Fluorescence/UV detection

Filter Media-Teflon Calibration is performed with representative Teflon sampling media in line Calibration is performed with representative Teflon sampling media in line  Rotameter  Flow is calibrated against ball “floating” in air in the chamber  Bubble tube(Manual or Electronic)  Flow is calibrated by timing bubble travel speed in vertical column

Filter Media-Teflon Teflon Filter Cassette Teflon Filter Cassette

References Cited SKC Inc. Corporate Web Page accessed 04/03/01 NIOSH Manual of Analytical Methods (NMAM®), 4th ed. DHHS (NIOSH) Publication (August, 1994), Cassinelli, M.E. & O'Connor, P.F. Eds. O'Connor, P.F. P.F.

Bibliography DiNardi Salvatore R. (1998) The Occupational Environment-Its Evaluation and Control, AIHA, Fairfax, Virginia DiNardi Salvatore R. (1998) The Occupational Environment-Its Evaluation and Control, AIHA, Fairfax, Virginia Goetsch David L. (1999) Occupational Safety and Health for Technologists, Engineers, and Managers, Prentice Hall, Upper Saddle River, New Jersey Goetsch David L. (1999) Occupational Safety and Health for Technologists, Engineers, and Managers, Prentice Hall, Upper Saddle River, New Jersey