Sieve analysis or a gradation test is an important method for assessing the particle size distribution of granular material. Particle size influences material properties like flow and conveying behavior (for bulk materials), reactivity, abrasiveness, solubility, extraction and reaction behavior, taste, compressibility, and many more. Particle size determination is therefore essential for a wide range of industries, such as food, construction, plastics, cosmetics, and pharmaceuticals, to optimize process engineering and to ensure the quality and safety of final products.
To measure particle size distribution, different methods and procedures can be applied, depending on the sample material, expected particle sizes, and the scope of the examination. These include direct image analysis, either static (SIA) or dynamic (DIA), static light scattering (SLS), also called laser diffraction (LD), dynamic light scattering (DLS), and sieve analysis. Sieve analysis is the traditional and most used method to measure particle size distribution.
Why sieve weighing is important
The advantages of sieve analysis include it is easy to use, requires minimal investment costs, offers accurate and reproducible results in a comparatively short time, and has the ability to separate particle size fractions. The sieve analysis procedure by differential sieve weighing is a tedious and error-prone process. Using an accurate balance with convenient features and digital data management can quickly pay off.