Particle size, porosity, surface area, roughness, wettability, or…
standard property measurement
Material Properties · Particle & Surface
Particle Size and Zeta Potential Analysis (DLS/PSD)
Use Particle Size and Zeta Potential Analysis (DLS/PSD) to evaluate particle size, porosity, surface area, roughness, wettability, or interfacial behaviour with a scope matched to your sample, application, and decision.
- Price
- from£18 per sample, excl. VAT
- Turnaround
- 5 working days Preparation and scope dependent
- Available platforms
- Malvern Zetasizer Nano
- Typical outputs
- Property values and distributionsProcessed plots or profilesTest conditions and comparison summaryMeasured property values
Why this service
What DLS/PSD can help you understand
Particle Size and Zeta Potential Analysis (DLS/PSD) is used to evaluate particle size, porosity, surface area, roughness, wettability, or interfacial behaviour. TESTDOG confirms the method, preparation,…
Differences between materials, batches, treatments, or service…
distribution or condition comparison
Whether the measured result supports a specification, root-cause, or…
advanced pore, surface, or interface analysis
Choose the scope
Start from the question, not the tool
The method, preparation route and reporting depth depend on what you need to decide.
Standard property measurement
particle size, porosity, surface area, roughness, wettability, or interfacial behaviour
- Best used when
- particle size, porosity, surface area, roughness, wettability, or interfacial behaviour
- Typical result
- Property values and distributions
- Preparation note
- Exact mass and any drying or dispersion step are confirmed after technical review.
Distribution or condition comparison
differences between materials, batches, treatments, or service conditions
- Best used when
- differences between materials, batches, treatments, or service conditions
- Typical result
- Processed plots or profiles
- Preparation note
- Declare volatility, corrosivity, suspended solids and any storage or temperature requirement.
Advanced pore, surface, or interface analysis
whether the measured result supports a specification, root-cause, or development decision
- Best used when
- whether the measured result supports a specification, root-cause, or development decision
- Typical result
- Test conditions and comparison summary
- Preparation note
- Gas compatibility, fittings, flow and safety controls are confirmed before acceptance.
Common outputs
A result package matched to the decision you need to make
Fields, conditions, processing and file formats are confirmed before work begins.
Property values and distributions reported with the agreed units, sample reference and measurement conditions.
Processed plots or profiles supplied in a labelled format suitable for direct sample or condition comparison.
Test conditions and comparison summary provided with the processing basis and quality checks agreed during technical review.
Measured property values included when selected in the confirmed reporting scope.
Sample requirements
What to provide before work begins
Provide representative, clearly labelled samples and identify the decision, feature or comparison that matters.
| Suitable sample | Submission requirement | Planning note |
|---|---|---|
| Powder / particles | Provide a dry, homogeneous and clearly labelled sample in a sealed container. | Exact mass and any drying or dispersion step are confirmed after technical review. |
| Liquid / solution | Provide a sealed, compatible container labelled with composition, concentration and solvent. | Declare volatility, corrosivity, suspended solids and any storage or temperature requirement. |
| Gas / headspace | Provide the gas composition, concentration range, cylinder or sampling format and required pressure. | Gas compatibility, fittings, flow and safety controls are confirmed before acceptance. |
Objective: state the decision, comparison or acceptance criterion the work must support.
Handling and access: declare hazards, instability, confidentiality, file constraints or special logistics before dispatch or transfer.
Questions and answers
Common planning decisions
Short answers to issues that can change preparation, scope, timing or interpretation.
What should I send for Particle Size and Zeta Potential Analysis (DLS/PSD)?
Provide powder / particles, liquid / solution, gas / headspace as applicable. Exact quantity, dimensions and preparation are confirmed during technical review.
Which scope should I choose?
Choose the scope that matches the decision, comparison and reporting depth you need; TESTDOG confirms the final route after technical review.
What will I receive?
Typical outputs include property values and distributions, processed plots or profiles, test conditions and comparison summary. Final files follow the confirmed reporting scope.
How long will it take?
Typical turnaround is 5 working days after sample acceptance and method confirmation.
Configure the service
Send the information needed to scope DLS/PSD correctly
- Sample form, material, dimensions and quantity
- Feature or decision the result must address
- Required comparison, acceptance criterion or reference
- Preferred output and reporting depth