PDI vs. SPAN: Which Metric Best Represents Particle Size Distribution?

In the fields of nanotechnology and materials science, particle size distribution (PSD) is a critical parameter that directly influences the performance and applicability of nanomaterials. Two of the most commonly used indicators to evaluate PSD are the Polydispersity Index (PDI) and the SPAN value. While often used interchangeably, these two metrics differ significantly in how they are calculated and interpreted. Understanding the distinction between PDI and SPAN is essential for accurate particle characterization.

Resuntech  Showcases NanoCoulter at EV Asia 2025 in Hong Kong

Resuntech proudly participated in Extracellular Vesicles Asia 2025, one of the most influential conferences in the Asia-Pacific region focused on extracellular vesicle (EV) research and applications. Held at the ALVA HOTEL BY ROYAL in Shatin, Hong Kong, the event brought together leading scientists, clinicians, and industry experts from around the world to explore the future of EVs in basic science, diagnostics, and therapeutics.