Computation of true data using the experiment penetration curve of moderately monodisperse aerosol
基本单分散气溶胶透过率测试中真实值的计算

By analyzing the principle of DOP media tester for the high-efficiency particulate air filter(HEPA) and ultra-low penetration air(ULPA) filter,it was found that the measured penetration with moderately monodisperse aerosol is not the true penetration for a given particle size,but the integrated penetration of a given test aerosol.The relationship between the true penetration of a single size and the measured penetration was studied.And the reason that results in the deviation between them was analyzed.A special computation method was put forward to obtain the true penetration of the given single particle size using the experimental data of the overall penetration–particle size relationship and the particle size distribution.The validity of the computation method was demonstrated using the experimental data.This method will greatly improve the accuracy of the HEPA and ULPA filter media DOP testers and broaden their applications.A high quality testing mean will be achieved for the theoretical and applied research of the high-efficiency filter media.