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particle size

Particle size distribution
🎯 Difficulty ★★☆ Medium Duration About 1–3 h 🎯 Use Determination of particle size and distribution of powders, emulsions and suspensions
📖 Principle
Laser scattering angle relates to particle size, from which the distribution is derived
Below are 5 steps. Open each to see how to do it and add products to your shared list.

📋 Workflow

Full workflow, products add-to-cart directly
1

Dispersion medium

15 min
Choose a dispersion medium matching the sample refractive index
💡 Tip Usually water or ethanol
⚠️ Caution Medium must be clean
🧪 Materials for this step (click to shop by spec/brand)
2

Calibration & background

15 min
Measure blank dispersion as background and calibrate with standard particles
💡 Tip Background should be low and stable
⚠️ Caution Periodically verify with standard particles
🧪 Materials for this step (click to shop by spec/brand)
3

Disperse & load

20 min
Disperse the sample in medium by ultrasonication and add to the cell
💡 Tip Use ultrasonication to prevent agglomeration
⚠️ Caution Keep obscuration moderate to avoid multiple scattering
🧪 Materials for this step (click to shop by spec/brand)
4

Measurement & acquisition

20 min
Run the measurement and record the scattering intensity distribution
💡 Tip Repeat for stable results
⚠️ Caution Avoid air bubbles
🧪 Materials for this step (click to shop by spec/brand)
5

Result & report

20 min
Calculate D10/D50/D90 and issue a size distribution report
💡 Tip Report D50 and other percentile sizes
⚠️ Caution Note dispersion conditions and refractive index
🧪 Materials for this step (click to shop by spec/brand)

⚠️ 5 Common Beginner Mistakes

  • High obscuration causing multiple scattering bias
  • Insufficient dispersion with agglomeration
  • Wrong refractive index parameters
  • Bubbles in medium interfering
  • Non-representative sampling

❓ FAQ

+What does D50 mean?
Median size; 50% of particles are smaller.
+Why dispersant?
Prevents agglomeration to get true distribution.
+Good obscuration?
Generally 10–20% is appropriate.

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Data authenticity: Product categories from JW Supply Chain standard taxonomy; method→step→product connected. Last updated: 2026-08-23 · v3.0