computer-based cascade impactor data reduction system
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computer-based cascade impactor data reduction system

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Published by Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory, for sale by the National Technical Information Service in Research Triangle Park, N.C, Springfield, Va .
Written in English


  • Air -- Pollution -- Measurement -- Data processing

Book details:

Edition Notes

StatementJ. W. Johnson ... [et al.], Southern Research Institute
SeriesInteragency energy-environment research and development program report ; EPA-600/7-78-042
ContributionsJohnson, J. W. 1950-, Southern Research Institute (Birmingham, Ala.)
The Physical Object
Paginationx, 562 p. :
Number of Pages562
ID Numbers
Open LibraryOL14888200M

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This publication describes a cascade impactor data reduction system designed to automatically reduce data taken with any one of four commercially available round jet cascade impactors: The Andersen Mark III Stack Sampler, the Brink Model BMS-ll (as sup- plied and with extra stages), the University of Washington Mark III Source Test Cascade Impactor, and the . ABSTRACT ip^ repOrt describes a computer-based data reduction system for cascade impactors. The system utilizes impactor -specific calibration information, together with operating conditions and other pertinent information (e.g., stage weights, sam- pling duration), to determine particle size distributions in several forms for indivi- dual runs. Numerical studies of the data reduction by a cascade impactor are conducted for specific conditions. It is clearly shown that the Twomey's method is superior to the conventional method which uses a 50% cut size, when nearly monodispersed particles are by: 2. The mass median aerodynamic diameter, d g, and geometric standard deviation, σ g, of an aerosol is typically determined from a reduction of data obtained with a cascade impactor under the simplifying assumption that each stage of the impactor has an ideal collection by:

A Comparison of Cascade Impactor Data Reduction Methods. In Eq. (3) they are (i) total particle mass (), (ii) geometric mean diameter (), (iii) and geometric standard deviation (). (3) By introducing a lognormal distribution function, inversion of cascade impactor data is performed to estimate a set of unknown parameters rather than solving for f in Eq. (2) at by: steps before getting the data. Compared to optical methods cascade impactors come as low cost instruments for single or multi point measurements during inhalation studies TSE impactors are precision engineered. Highest demands are paid on each individual impactor via comprehensive checks during and after the production. Analysis of Cascade Impactor Mass Distributions technique rather than the data analysis procedure. Data reduction techniques can enable the .

A3G – AUTOMATED ANDERSEN CASCADE IMPACTOR A3G CONFIGURATIONS pMDI CONFIGURATION NASAL CONFIGURATION DPI CONFIGURATION DUSA CONFIGURATION Advantages of A3G Versatile machine. Can be user configured for Oral or Nasal APSD test, and for 30/60/90 LPM in a matter of minutes. Can Dose in ACI Column or in DUSA Tube. In the the . A Data reduction system for cascade impactors Author: Joseph D McCain ; Industrial Environmental Research Laboratory (Research Triangle Park, N.C.) ; Southern Research Institute.   Good Cascade Impactor Practice (GCIP) requires that these critical dimensions are linked to the accuracy of the APSD measurement based on the aerodynamic diameter size scale. Effective diameter (Deff) is the critical dimension describing any nozzle array, as it is directly related to stage cut-point size (d50).Cited by: 9. Good Cascade Impactor Practices, AIM and EDA for Orally Inhaled Products brings together for the first time a review of best practices for performing cascade impactor testing with a thorough discussion of the recently introduced concepts of abbreviated impactor measurements (AIM) and efficient data analysis (EDA).Format: Hardcover.