Author: A.V Filippov
Publisher:
ISBN:
Category :
Languages : en
Pages : 8

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Author: Francisco Javier Romay
Publisher:
ISBN:
Category :
Languages : en
Pages : 356

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Author: You-Hong Pui
Publisher:
ISBN:
Category :
Languages : en
Pages : 466

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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 814

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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 892

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Author:
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ISBN:
Category :
Languages : en
Pages :

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The electrical charging of aerosol particles by unipolar gaseous ions was studied theoretically and experimentally. The primary objective of the study was to make precise determinations of the aerosol particle charge under various conditions of charging and to compare the experimental results with those predicted by theory. Experiments were performed using monodisperse oleic acid aerosols generated by a vibrating orifice generator, monodisperse NaCl and DOP (di-octyl phthalate) aerosols generated by an electrostatic classification method, and sulfuric acid aerosols generated by the photo-chemical conversion of gaseous SO2 in the smog chamber. The experiments covered a particle size range of 0.0075 .mu.m to 5.04 .mu.m diameter. The corresponding range in Knudsen number (Kn = lambda/sub i//a, lambda/sub i/ = mean free path of ions, a = particle radius) was from 0.0056 to 3.86. The charging parameter, n0t, was varied between 2.56 x 106 to 5.1 x 107 ion-s/cc, where n0 is the concentration of ions and t is the charging time. Comparisons of the results with available aerosol charging theories indicate that there is reasonable agreement between the theory and experiment in the continuum regime (Kn “1) where the classical Fuchs--Pluvinage equation is expected to apply. However, in the free molecular (Kn” 1) and the transition regimes (Kn approx. or equal to 1), where the ion mean free path is no longer small in comparison with particle size, there is considerable discrepancy between the experimental data and available charging theories. A semi-empirical equation was developed which agrees well with the experimental data over the entire range of particle size and charging parameters covered in the experiments. Theoretical results are presented showing the distribution of charges on the particles as a function of particle size and the charging parameter n0t. 70 figures, 24 tables, 112 references. (auth).

Author: Paul H. Gamache
Publisher: John Wiley & Sons
ISBN: 0470937785
Category : Science
Languages : en
Pages : 548

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The first book devoted exclusively to a highly popular, relatively new detection technique Charged Aerosol Detection for Liquid Chromatography and Related Separation Techniques presents a comprehensive review of CAD theory, describes its advantages and limitations, and offers extremely well-informed recommendations for its practical use. Using numerous real-world examples based on contributors’ professional experiences, it provides priceless insights into the actual and potential applications of CAD across a wide range of industries. Charged aerosol detection can be combined with a variety of separation techniques and in numerous configurations. While it has been widely adapted for an array of industrial and research applications with great success, it is still a relatively new technique, and its fundamental performance characteristics are not yet fully understood. This book is intended as a tool for scientists seeking to identify the most effective and efficient uses of charged aerosol detection for a given application. Moving naturally from basic to advanced topics, the author relates fundamental principles, practical uses, and applications across a range of industrial settings, including pharmaceuticals, petrochemicals, biotech, and more. Offers timely, authoritative coverage of the theory, experimental techniques, and end-user applications of charged aerosol detection Includes contributions from experts from various fields of applications who explore CAD’s advantages over traditional HPLC techniques, as well its limitations Provides a current theoretical and practical understanding of CAD, derived from authorities on aerosol technology and separation sciences Features numerous real-world examples that help relate fundamental properties and general operational variables of CAD to its performance in a variety of conditions Charged Aerosol Detection for Liquid Chromatography and Related Separation Techniques is a valuable resource for scientists who use chromatographic techniques in academic research and across an array of industrial settings, including the biopharmaceutical, biotechnology, biofuel, chemical, environmental, and food and beverage industries, among others.

Author:
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ISBN:
Category : Air
Languages : en
Pages : 588

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Author:
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Category : Power resources
Languages : en
Pages : 526

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Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages : 1132

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