G-values and hyperfine structure
CW EPR
Material Analysis · Structure & Spectroscopy
Electron Paramagnetic / Spin Resonance Spectroscopy (EPR/ESR)
Characterise g-values and hyperfine structure, radical, defect, or transition-metal identity, and spin concentration and relaxation where configured using a scope agreed around your sample and decision.
- Price
- from£45 per sample, excl. VAT
- Turnaround
- 8 working days Preparation and scope dependent
- Available platforms
- Bruker ELEXSYS E580
- Typical outputs
- EPR/ESR spectraG-value and hyperfine assignmentsOptional spin quantification, simulation, or relaxation dataProcessed spectra
Why this service
What EPR/ESR can help you understand
Electron Paramagnetic / Spin Resonance Spectroscopy is selected when the project needs defensible information on g-values and hyperfine structure, radical, defect, or transition-metal identity, or spin…
Radical, defect, or transition-metal identity
variable-temperature or in-situ EPR
Spin concentration and relaxation where configured
pulsed EPR and relaxation
Choose the scope
Start from the question, not the tool
The method, preparation route and reporting depth depend on what you need to decide.
CW EPR
g-values and hyperfine structure
- Best used when
- g-values and hyperfine structure
- Typical result
- EPR/ESR spectra
- Preparation note
- Exact mass and any drying or dispersion step are confirmed after technical review.
Variable-temperature or in-situ EPR
radical, defect, or transition-metal identity
- Best used when
- radical, defect, or transition-metal identity
- Typical result
- G-value and hyperfine assignments
- Preparation note
- Declare volatility, corrosivity, suspended solids and any storage or temperature requirement.
Pulsed EPR and relaxation
spin concentration and relaxation where configured
- Best used when
- spin concentration and relaxation where configured
- Typical result
- Optional spin quantification, simulation, or relaxation data
- Preparation note
- Declare biological hazards and confirm fixation, dehydration, temperature and disposal requirements.
Common outputs
A result package matched to the decision you need to make
Fields, conditions, processing and file formats are confirmed before work begins.
EPR/ESR spectra reported with the agreed units, sample reference and measurement conditions.
G-value and hyperfine assignments supplied in a labelled format suitable for direct sample or condition comparison.
Optional spin quantification, simulation, or relaxation data provided with the processing basis and quality checks agreed during technical review.
Processed spectra 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. |
| Biological / soft material | Provide fixed, preserved or otherwise stabilised material in the agreed container and medium. | Declare biological hazards and confirm fixation, dehydration, temperature and disposal requirements. |
| Device / assembly | Provide a complete labelled device or assembly with drawings, interfaces and operating limits. | Confirm power, connections, operating state, access restrictions and permitted disassembly. |
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 Electron Paramagnetic / Spin Resonance Spectroscopy?
Provide powder / particles, liquid / solution, biological / soft material, device / assembly as applicable. Exact quantity, dimensions and preparation are confirmed during technical review.
Which analysis option should I choose?
Choose the mode around the decision you need to make. For g-values and hyperfine structure, start with CW EPR; add variable-temperature or in-situ EPR when comparison or quantification is required.
How long will the test take?
Typical turnaround is 8 working days after sample acceptance and method confirmation.
What can limit the result?
Only paramagnetic species are directly observed. Broad, overlapping, conductive, or very dilute signals may be difficult to interpret.
Configure the service
Send the information needed to scope EPR/ESR 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