Vocus CI-TOF: The Ultimate Solution for Real-Time Trace Gas Analysis

Detect the invisible in real time.

Elevate your analytical capabilities with the world’s most advanced Chemical Ionization Time-of-Flight technology.

The Vocus CI-TOF delivers unparalleled speed and sub-ppt (parts-per-trillion) precision, making ultra-trace VOC detection faster, highly reliable, and accessible for any advanced monitoring project.

Vocus CI-TOF: Cutting-Edge Technology for Advanced Analytics

Real-Time Identification of Trace Gases at Ultra-Low Concentrations

The applications of this technology are extensive: analysis of expired air to detect disease markers, indoor air quality control, evaluation of material emissions, etc.

Thus, the increasing impact of Volatile Organic Compounds (VOCs) and inorganic compounds on our health, even at very low concentrations, is increasingly documented. Real-time analysis therefore offers complete kinetics, indispensable for thorough and exhaustive studies.

Real-Time Kinetic Analysis and Emission Profiling

The core strength of the Vocus CI-TOF lies in its real-time gas analysis capabilities, delivering highly precise kinetic emission profiles. The advanced software empowers you to either track specific target compounds or continuously identify untargeted analytes as they emerge.

To guarantee optimal sensitivity and selectivity across all chemical classes, the instrument can be configured with various interchangeable ion sources and reactors, perfectly tailored to your specific application.

Vocus-CI-Series

The VOCUS CI-TOF, manufactured by TOFWERK, is a flight-time spectrometer with unique specifications that make it a cutting-edge tool:

  • High resolution up to 25,000 M/ΔM
  • Several ions available, interchangeable in seconds to promote selective detections.
  • 2 types of reactors available and interchangeable: PTR or AIM with each several ions available.

Operating Principle:
The VOCUS CI-TOF is based on the principle of Time Of Flight mass spectrometry: The gaseous sample to be analysed is introduced into the analyser and then ionized into the reactor by the ion of your choice; The different compounds will be separated and transferred to the detector more or less quickly depending on their m/z ratio. The flight time mass spectrometry is recognized for its resolution and sensitivity.

Chemical ionization also has the advantage, depending on the ion, of creating little or no fragmentation, facilitating identification. The choice of the ion and the reactor makes it possible to concentrate on certain chemical classes of compounds (inorganics, bases, acids, etc.) and to detect them in an ultra sensitive way:

The PTR reactor is a powerful system for analyzing a wide range of volatile organic compounds (VOCs). This allows to target various ranges of compounds with high quality results.

The Aim reactor promotes the rapid and sensitive detection of traces of organic and inorganic compounds. The flexible chemistry of reactive ions allows selective ionization with independent moisture performance, offering extremely sensitive detection in various applications with less fragmentation.

Analysis time: 1 s at 1 min (depends on reactor and model)
Configuration: 1 interchangeable reactor (PTR or AIM). Up to 6 ions
Detection range: < 5 ppt to ppmv

Options:

- expired air sampler
- battery
- field mobility option

The Vocus CI-TOF series is available in several more or less sensitive and resolutive versions according to your needs. Consult us to select the version suitable for your application.
Details of the versions in the brochure in the Documentation tab.

NB Interchangeable reactors only on the Vocus CI series.

The Vocus PTR-TOF is only available with a PTR reactor.
The Vocus B is only available with an AIM reactor.

Why Choose the Micro GC Fusion®?
The flexibility of the CI-TOF VOCUS allows us to address a wide range of applications and explore complex compositions in detail. It is thus possible to change reactor and ions for better selectivity.

Capture ecran brochure

For smaller needs PTR or Aim versions only are available with lower resolutions.

Expertly Integrated Ecosystems: The Anatomy of a CHEMLYS Solution

Advanced Sampling & Interface Solutions

Gas sampling accessories (adapted sample input).

Everything for a consistent analysis of your sample and the management of its constraints (Pressure, Temperature, Reactivity...).

Implementation

Development of the application at your side with your samples and according to your constraints (Pressure, Temperature, Flow, available volume )

Our commitment concludes with personalized, hands-on training tailored to your industry’s requirements, ensuring your team achieves immediate operational proficiency and long-term analytical autonomy.

Scalable Configurations: Future-Proofing Your Investment

As your analytical requirements evolve, so does our technology. Whether you need to reconfigure your GC pathways or adapt sampling interfaces to meet new process constraints, CHEMLYS provides the expert engineering to upgrade and optimize your existing system.

Adding or adapting sampling to the new constraints of your process, we will accompany you on the most suitable solution.

With CHEMLYS support, you’re guaranteed a turnkey installation of your analyzer in your process. Our expert technicians ensure that the solution meets all your expectations.

Examples of applications

Food

Vocus Cork Analyzer for measuring TCA in wine bottle corks to prevent cork taint.

Industrial Chemistry

Vocus PTR-TOF for the study of sources of indoor air pollution.

Environment

Vocus Eiger for measuring air quality around a landfill and measuring olfactory nuisance.

Medical

Vocus PTR-TOF for the COVID-Air project, i.e. the measure of Covid markers in expired air.

Research

Vocus PTR-TOF for the study of VOCs on various biological models (plants, mammals, etc.) in interaction with their environment.

Did an applicaion get your attention? Contact us for more details on the configuration of your PTR-TOF and our other examples of applications!

Frequently Asked Questions about Micro GC Fusion®:

How does Micro GC Fusion® differ from a conventional lab bench GC or an optical/spectrometric analyser?

More than an alternative to traditional laboratory GCs, the Micro GC Fusion miniaturizes the technology while dramatically cutting run times. Utilizing independent analytical modules operating in parallel—each featuring MEMS micro-injectors and micro-TCDs—it resolves and quantifies complex gas streams in 1 to 3 minutes, against 15 to 45 minutes for a classic GC.

Unlike optical spectrometers (NDIR, FTIR) or electrochemical sensors, which are frequently constrained by cross-interferences and narrow matrix tolerances, the Micro GC relies on full physical chromatographic separation. Simultaneously measure permanent gases, sulfur species, and light hydrocarbons with zero spectral interference or false positives.

Can high concentrations and ppm-level traces be quantified simultaneously in one run (e.g., H₂, CO₂, biogas)?

Yes. The micro-TCD detector offers an exceptional dynamic range of over five decades, measuring major volume percentages with the same high precision as trace-level components. (e.g. 0 to 100% of CH4 and CO2 in raw or purified biogas) and traces to ppm (e.g. impurities H2S, O2 or N2 in High purity hydrogen).

Furthermore, thanks to its fixed-volume injector, the Micro GC Fusion® features a unique design that eliminates matrix effects and ensures exceptional linearity, regardless of matrix variations across your samples.

What sample types are compatible, and how do you handle moisture or condensable vapors (water, light alcohols like methanol)?

The Micro GC Fusion® accommodates any dry or humid (non-condensing) gas stream at sample pressures up to 2 bar gauge (30 psig).

When dealing with condensable or polar vapors (water vapor, heavy hydrocarbon fractions, methanol), CHEMLYS supports you with turnkey sample preparation engineered for your operational parameters. Through heated sample lines, active conditioning, and online dilution, we guarantee sample representativeness, prevent liquid condensation inside the Micro GC Fusion®, and protect analytical hardware during vapor-phase runs.

Is advanced chromatography training required for daily use of the Micro GC Fusion®?

No. The instrument is engineered to streamline daily operation in both field environments and R&D laboratories. Featuring an onboard web server, the Micro GC Fusion® is controlled directly from any standard web browser (on PC, tablet, or smartphone)—with no software installation or tedious IT maintenance required. Analytical methods developed and validated by CHEMLYS are pre-loaded: non-specialist operators simply connect the sample line and launch the run with a single click to obtain direct, real-time concentration readouts.

Blog & Testimonials

Video Conferencing at the Heart of CHEMBOX

Looking to maximize the performance of your CHEMBOX without wasting valuable time? Streamlining your daily work tools does not have to mean endless training sessions or multi-day workshops. In most cases, a simple return to the...

read more