The concentration and size distribution of particles in beer may be measured using the Coulter Principle also known as the Electrical Sensing Zone (ESZ) method. A suitable electrolyte solution is required to perform the analysis.The sample is prepared by dissolving a certain volume of beer in the electrolyte and then analyzed using a Beckman Coulter Multisizer 3 to determine the size distribution and concentration for the particles present in the beer. The results are reported as number of particles per milliliter for the desired size range. The use of the Multisizer 3 provides a fast, easy, accurate and automatic method to determine the particle content in beer.
The use of this instrument also provides reliable results not dependent on the operator’s judgment making it possible to compare data from different work shifts and/or breweries.