Filtration and Particle Size Analysis - Why these Techniques Need to be Utilized Together

Larry Unger, EMEA, Particle Sizing Systems, Port Richey, FL, USA

Many processes utilize filtration at some stage.  As a generalization, most filtrations are performed with the belief that the filters fully remove particles over a stated particle size.  For some applications, this simple assumption may be satisfactory to ensure a usable product, but for many applications, for example: pharmaceutical, inkjet inks and printing, and CMP for electronics, this assumption may lead to the production of products which result in a defective product which can result in production losses or even death of a patient.  There are a number of particle size analysis techniques available to the market, but some perform differently from others, rendering them less suitable for a particular application. 

This presentation will provide a brief overview of particle sizing techniques available and examine the pros and cons of those techniques when employed in the analysis of products, both pre- and post-filtration.  Examples of samples from a variety of fields will be presented demonstrating the efficiency of filtration on these products.

Short Biography of Presenting Author

Dr. Unger has been managing distribution of analytical instrument for companies including Particle Sizing Systems, Mettler-Toledo Process Analytical, CILAS, Fisher Scientific, Spectronic Instruments, and others for more than 30 years. 

A trained organic chemist, academic credentials include:

B.Sc. in Chemistry - Philadelphia College of Pharmacy and Science

M.A. in Organic Chemistry - Brandeis University

Ph.D. in Organic Chemistry - Temple University

Post-Doctoral Fellowship - University of Pennsylvania

Adjunct Faculty - Temple University, Florida Atlantic University Honors College

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