Correlating light scattering particle sizing results with sieving results
Light scattering particle size analysis is faster than sieving, which makes it suitable not only for laboratory testing but for in-process analysis, as well. However, using a light scattering method will provide results that don't fit product quality standards, which historically have been based on sieving. This article explains how to correlate results of light scattering particle sizing with those of sieving so you can take advantage of light scattering's speed but retain your sieving knowledge base. After describing sieving and ensemble angular light scattering, sections discuss the influence of particle shape on the method's results, as well as testing the methods, comparing the results, and establishing your own correlation. Related information provides other perspectives on correlating light scattering results with sieving results.
Sieving is one of the oldest, simplest, and least expensive particle sizing methods. As a result, many product quality standards are based on sieving size distribution results. But sieving is time- consuming. The need for faster particle size analysis -- not only in the lab, but in the process line -- has helped to drive the development of several light scattering sizing methods.