fulltext_002 - 43 Abstract The quality of particle size...

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Unformatted text preview: 43 Abstract: The quality of particle size analysis for the purpose of control of prod- uct quality consists of several parts. First, the most relevant parameter(s) have to be chosen to represent the quality of a specific product in a specific application. Some background is given, but an optimum answer to any new product with new properties can only be found by thorough investigation, knowledge and experience. Secondly, the quality aspects of both technique and total procedure for measure- ment have to be considered in relation to the requirements set for product perform- ance and an adequate procedure selected. The quality aspects of a technique include measurement range, analysis time, precision, noise, drift, bias, accuracy, resolu- tion, sensitivity, lower detection limit, traceability, and investment and labor costs. A quantitative description for these aspects is given together with the major error sources. Altogether, it is advised to set up a protocol for each PSD measurement method in relation to the given application(s), in which all choices made are clearly described. Chapter 3 Quality Aspects in Particulate Analysis Good practice requires: • adequate quality for selected PSD parameter(s) • realistic evaluation of quality versus costs • adequate design of the total procedure • use of existing written standards • statement on method validation • Standard Operating Procedures and Protocol • adequate reporting of results H.G. Merkus, Particle Size Measurements, DOI 10.1007/978-1-4020-9015-8_3, © Springer Science+Business Media B.V. 2009 Contents 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3.2 Relevant parameters for Product Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3.3 Quality Aspects in Particulate Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.4 Design of a PSD Analysis Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 3.5 Definitions, Abbreviations and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Annex 3A: Protocol and Standard Operating Procedures for Adequate Characterization of Particulate Products . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Annex 3B: Typical Properties of Particulate Materials . . . . . . . . . . . . . . . . . . . . . . . . . 72 44 3 Quality Aspects in Particulate Analysis 3.1 Introduction In the previous chapter it has been shown that many equivalent particle sizes are available to represent the size of a non-spherical particle, which in turn depends on the measurement principle. Only for spheres, the same diameter should result from measurements, regardless of measurement principle. Most often, however, from measurements, regardless of measurement principle....
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This note was uploaded on 05/06/2010 for the course MECH. 28197 taught by Professor Dr.shafii during the Spring '10 term at Sharif University of Technology.

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fulltext_002 - 43 Abstract The quality of particle size...

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