Particle size refers to the geometric dimensions of particles. Particle size testing is a technology that measures and analyzes parameters such as size distribution and average particle size of particulate matter (e.g., powders, emulsions, aerosols, nanomaterials) through physical, chemical, or optical methods. In industries like pharmaceuticals, chemicals, and food, particle size directly affects product performance (e.g., solubility, dispersibility, stability) and production processes (e.g., fluidity, filtration efficiency).
Testing Methods
- Laser Particle Size Analysis
- Electron Microscopy
Instrument Technical Parameters
- Laser Particle Size Method:
- Range: 1–1000 μm
- Precision: ± 0.1 μm
- Electron Microscopy Method:
- Range: 10 nm–1000 μm
- Precision: ± 1 nm
Sample Submission Requirements and Precautions
- Solid samples: 0.5–1 g.
- Laser particle size method: Samples must not react with water or swell.
- Electron microscopy method: Samples must be non-magnetic.
Testing Examples
Reference Standards
- GB/T 38398-2019: Textiles - Filtration Performance - Determination of Most Penetrating Particle Size
- GB/T 3780.17-2017: Carbon Black - Part 17: Indirect Determination of Particle Size - Reflectance Method
- GB/T 5758-2023: Ion Exchange Resins - Test Methods for Particle Size, Effective Particle Size, and Uniformity Coefficient
- GB/T 15445.2-2006: *Representation of Particle Size Analysis Results *
- GB/T 24891-2010: Determination of Particle Size of Compound Fertilizers
- GB/T 6288-2021: Test Method for Particle Size of Granular Molecular Sieves
- GB/T 40944-2021: Determination of Feed Particle Size
- ISO 9276-2:2014: Representation of Results of Particle Size Analysis - Part 2: Calculation of Average Particle Size/Diameter and Moments from Particle Size Distribution
- ISO 19430:2016: Particle Size Analysis - Particle Track Analysis (PTA) Method
- DIN CEN/TS 17434:2020: Ambient Air - Determination of the Particle Size Distribution
- DIN CEN/TS 17760:2022: Inorganic Fertilizers - Determination of Particle Size of High-Nitrogen Ammonium Nitrate Fertilizers
- VDI 3867 BLATT 5-2013: Measurement of Particulate Matter in Outdoor Air
