Particle Size Standards

Reliable particle sizing begins with trusted references. Particle size standards offer well-characterized materials to verify instrument performance, support method development, and maintain data comparability across projects and facilities. Options commonly include polystyrene latex spheres for optical calibration, mobility standards for DMA-based systems, and aerodynamic references for time-of-flight instruments.

Why standards matter:

• Calibration Confidence: Documented diameters and uncertainties support traceable checks and routine verifications.
• Method Consistency: Shared references align results across instruments and sites.
• Quality Systems: Support audits, SOPs, and proficiency testing with clear, repeatable procedures.
• Troubleshooting: Detect drift or contamination by comparing instrument response to known values.

Selection tips:

• Match the Physics: Use refractive-index-appropriate spheres for optical systems, and mobility standards for electrostatic sizing.
• Span the Range: Choose a set that covers your operating bins to test linearity and response.
• Storage and Handling: Follow guidance for dispersion, dilution, and shelf life to maintain integrity.
• Documentation: Retain certificates, uncertainty budgets, and batch data for your quality records.

Use cases:

• SMPS and DMA: Validate transfer functions and check multiple charge corrections.
• OPCs and Imaging: Confirm sizing accuracy and response to optical properties.
• Aerodynamic Sizers: Check flight-time calibration using appropriate references.
• Microscopy: Benchmark image analysis pipelines with well-defined particles.

Implement a routine schedule for incoming inspection, periodic checks, and after-service verification. With the right standards program, laboratories can reduce uncertainty, improve reproducibility, and support publication-ready results. Our team can help select standards tailored to your instruments, matrices, and regulatory environment.