CD or CPL spectrum
far-UV, near-UV, or visible CD
Material Analysis · Structure & Spectroscopy
Circular Dichroism Spectroscopy (CD)
Characterise CD or CPL spectrum, ellipticity or luminescence dissymmetry factor, and secondary-structure or chiral-state changes using a scope agreed around your sample and decision.
- Price
- from£75 per sample, excl. VAT
- Turnaround
- 7 working days Preparation and scope dependent
- Available platforms
- Jasco J-1700Applied Photophysics Chirascan Q100BRIGHTTIME Chirascan, JASCO810
- Typical outputs
- CD or CPL spectrumMolar ellipticity or dissymmetry factorOptional secondary-structure or temperature-series analysisProcessed spectra
Why this service
What CD can help you understand
Circular Dichroism Spectroscopy is selected when the project needs defensible information on CD or CPL spectrum, ellipticity or luminescence dissymmetry factor, or secondary-structure or chiral-state…
Ellipticity or luminescence dissymmetry factor
CPL emission
Secondary-structure or chiral-state changes
temperature, kinetics, or titration series
Choose the scope
Start from the question, not the tool
The method, preparation route and reporting depth depend on what you need to decide.
Far-UV, near-UV, or visible CD
CD or CPL spectrum
- Best used when
- CD or CPL spectrum
- Typical result
- CD or CPL spectrum
- Preparation note
- State the substrate, nominal thickness and whether sectioning or mounting is permitted.
CPL emission
ellipticity or luminescence dissymmetry factor
- Best used when
- ellipticity or luminescence dissymmetry factor
- Typical result
- Molar ellipticity or dissymmetry factor
- Preparation note
- Declare volatility, corrosivity, suspended solids and any storage or temperature requirement.
Temperature, kinetics, or titration series
secondary-structure or chiral-state changes
- Best used when
- secondary-structure or chiral-state changes
- Typical result
- Optional secondary-structure or temperature-series analysis
- 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.
CD or CPL spectrum reported with the agreed units, sample reference and measurement conditions.
Molar ellipticity or dissymmetry factor supplied in a labelled format suitable for direct sample or condition comparison.
Optional secondary-structure or temperature-series analysis 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 |
|---|---|---|
| Film / coating | Provide the coated substrate or a flat film with the test surface and coating side clearly marked. | State the substrate, nominal thickness and whether sectioning or mounting is permitted. |
| 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. |
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 Circular Dichroism Spectroscopy?
Provide film / coating, liquid / solution, biological / soft material 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 CD or CPL spectrum, start with far-UV, near-UV, or visible CD; add CPL emission when comparison or quantification is required.
How long will the test take?
Typical turnaround is 7 working days after sample acceptance and method confirmation.
What can limit the result?
Scattering, linear dichroism, concentration error, and cell artefacts can mimic weak signals. Structural interpretation is model-dependent.
Configure the service
Send the information needed to scope CD 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