Dynamic Light Scattering instrument selection -Industry wise Comparision

PARTICLE SIZE ANALYSER

Nextagen Analytics

2/13/20253 min read

Selecting the right DLS instrument depends on industry-specific needs, sample characteristics, and required precision. Below are key factors to consider, categorized by general selection criteria and industry-specific requirements.

1. General Selection Criteria for DLS Instruments

🔹 Particle Size Range: Choose an instrument that covers the size range of your sample (typically 1 nm – 10 µm for DLS).

🔹 Polydispersity & Sample Complexity: If your sample has a broad particle size distribution, ensure the DLS system has an advanced deconvolution algorithm.

🔹 Scattering Angle & Optical Configuration:

90° & 173° (backscattering): Ideal for proteins, nanoparticles, and colloids.
Low-angle (15° – 30°): Suitable for large particles & aggregates.

🔹 Concentration Handling: Some instruments work better with highly diluted samples, while others support higher concentrations.

🔹 Temperature Control: If your application requires temperature-sensitive measurements (e.g., proteins, pharmaceuticals), opt for a system with precise thermal regulation.

🔹 Sample Volume Requirement: Some applications require low sample volumes (µL range) for costly or rare materials.

🔹 Automated vs. Manual Mode: If you require high-throughput analysis, choose an automated DLS system with multi-sample capabilities.

🔹 Software & Data Analysis: Advanced AI-based algorithms improve accuracy, especially for complex or polydisperse samples.

🔹 Cost & Maintenance: Ensure the system fits within your budget while considering long-term operating costs and consumables.

2. Industry-Specific Considerations

A. Pharmaceuticals & Biotechnology

✔ Key Requirements:

Protein & Antibody Stability Studies
Nanoparticle-based Drug Delivery Analysis
Liposomes, Micelles, and Vesicle Sizing

✔ Factors to Consider:

High Sensitivity for detecting small biomolecules (~1 nm)
Low Sample Volume Handling (~10-50 µL) to minimize reagent wastage
Temperature Control (4°C to 80°C) for protein denaturation studies
Aggregation Detection to check protein stability
High Precision & Repeatability for critical pharmaceutical formulations

🔹 Recommended Instrument Features:

Multi-angle detection (90° & 173°) for accurate nanoparticle size analysis
Electrophoretic Light Scattering (ELS) Add-on for zeta potential measurement
Automation & High Throughput for quality control in production

Example Applications:

Monoclonal Antibody (mAb) formulation stability
Liposome-based drug delivery
Vaccine development (e.g., mRNA vaccine nanoparticle analysis)

B. Nanotechnology & Material Science

✔ Key Requirements:

Nanoparticle Sizing & Surface Charge Analysis
Polymer & Colloidal Stability Studies
Quantum Dot & Nanomaterial Dispersion Studies

✔ Factors to Consider:

Broad Particle Size Range (1 nm – 10 µm) for diverse nanomaterials
Backscatter Detection (173°) for Highly Concentrated Samples
Integration with Other Techniques (e.g., AFM, TEM, SAXS)
High Temperature Resistance (up to 100°C) for Material Stability Studies

🔹 Recommended Instrument Features:

Multi-modal size distribution analysis (Mie Theory, Non-Negative Least Squares (NNLS) fitting)
Zeta potential measurement for nanoparticle surface charge characterization
High-precision laser source for better signal-to-noise ratio

Example Applications: