Which gases or volatile products form during the electrochemical…
Targeted mass-channel monitoring
Performance Testing · Electrical & Electrochemical
Differential Electrochemical Mass Spectrometry (DEMS)
Track volatile electrochemical products and gas evolution in real time alongside current, potential and charge.
- Price
- from£600 per sample, excl. VAT
- Turnaround
- 16 working days Preparation and scope dependent
- Available platforms
- Hiden HPR-40 DEMS
- Typical outputs
- Ion current versus time or potentialSynchronous electrochemical curvesProduct onset and relative evolution ratesCell, gas-channel and programme record
Why this service
What DEMS can help you understand
DEMS couples an electrochemical cell to a fast mass spectrometer. It links ion-current signals for selected mass channels with electrochemical events, helping identify reaction products, parasitic gases…
At what potential or time does each product begin?
Potential or current programme
How do catalyst, electrolyte or cycling conditions change product…
Comparative gas-evolution study
Choose the scope
Start from the question, not the tool
The method, preparation route and reporting depth depend on what you need to decide.
Targeted mass-channel monitoring
Which gases or volatile products form during the electrochemical programme?
- Best used when
- Which gases or volatile products form during the electrochemical programme?
- Typical result
- Ion current versus time or potential
- Preparation note
- Exact mass and any drying or dispersion step are confirmed after technical review.
Potential or current programme
At what potential or time does each product begin?
- Best used when
- At what potential or time does each product begin?
- Typical result
- Synchronous electrochemical curves
- Preparation note
- Declare volatility, corrosivity, suspended solids and any storage or temperature requirement.
Comparative gas-evolution study
How do catalyst, electrolyte or cycling conditions change product evolution?
- Best used when
- How do catalyst, electrolyte or cycling conditions change product evolution?
- Typical result
- Product onset and relative evolution rates
- 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.
Ion current versus time or potential reported with the agreed units, sample reference and measurement conditions.
Synchronous electrochemical curves supplied in a labelled format suitable for direct sample or condition comparison.
Product onset and relative evolution rates provided with the processing basis and quality checks agreed during technical review.
Cell, gas-channel and programme record 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. |
| Test coupon / specimen | Provide labelled specimens prepared to the agreed geometry, orientation and surface condition. | Confirm the applicable standard, dimensions, loading direction and number of replicates. |
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.
Can DEMS quantify every gas absolutely?
Not automatically. Absolute quantification requires suitable calibration and a validated transfer path for each target species.
What is the typical turnaround?
Typical turnaround is 16 working days after sample acceptance and method confirmation.
Configure the service
Send the information needed to scope DEMS 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