A basic guide to particle characterization（一个基本粒子表征指南）.pdfVIP

HIT EPA PER A basic guide to particle characterization Introduction PARTICLE SIZE The aim of this guide is to provide you with a basic grounding in the main PARTICLE SHAPE particle characterization techniques currently in use within industry and academia. It assumes no prior knowledge of particle characterization theory or instrumentation and should be ideal for those new to particle characterization, or those wishing to reinforce their knowledge in the area. The guide covers introductory basics, particle characterization theory and particle characterization instrumentation, as well as a quick reference guide to help you decide which techniques might be most appropriate for your particle characterization needs. What is a particle? At the most basic level, we can define a particle as being a discrete sub-portion of a substance. For the purposes of this guide, we shall narrow the definition to include solid particles, liquid droplets or gas bubbles with physical dimensions ranging from sub-nanometer to several millimeters in size. The most common types of materials consisting of particles are: • powders and granules e.g. pigments, cement, pharmaceutical ingredients • suspensions, emulsions and slurries e.g. vaccines, milk, mining muds • aerosols and sprays e.g. asthma inhale