Compact Gc-ptr
An ultra-compact, field-deployable PTR-TOF-MS combined with online TD-GC for the in situ monitoring of volatile organic compounds (VOCs)
Aerodyne Research offers an instrument package that combines recent innovations in online gas chromatography (GC) with an ultra compact PTR-TOF-MS resulting in a highly field-deployable system for in situ measurements of VOCs.
The system automatically alternates between two acquisition modes on a user-defined interval:
- direct high-time resolution detection by PTR-TOF-MS
- isomer resolved detection by GC-PTR-TOF-MS
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The GC system, equipped with integrated thermal desorption (TD) preconcentration, offers pseudo-continuous molecular speciation for isomer-level resolution while maintaining parts-per-trillion (ppt) limits of detection across wide volatility and functionality ranges.
Online gas chromatograph (GC) system with integrated thermal desorption (TD) preconcentration coupled with an ultra compact proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS)
GC Accessories
Oxidant Scrubber / Sulfite Trap
Inline oxidant scrubber to mitigate sampling artifacts during preconcentration
TDPC-Water trap
Additional water removal pre-stage for TDPC system for high volatility species (C2-C3 non-polar species)
Additional GC column oven assembly for ARI GC
Includes: GC oven spindle, oven heaters and temperature sensors (x2), single electrical connection, pre-loaded with GC column of user’s choice, appropriate fittings for simple installation into our GC
Dual Detector Valve - Valve to Support Dual Detectors
Additional 2-position chromatography valve, upgrades Aerodyne GC to allow for the use of two detectors, fully software integrated
TERN and Tofware (Included)
Provides de-convoluted peak fitting for overlapping chromatographic peaks. Compatible for analysis of both high resolution (HR) and unit mass resolution (UMR) data.
Compact GC-PTR Advantages
- Field-deployable. Compact, robust design makes advanced, research-grade measurements possible in challenging and remote environments.
- Fully automated switching between GC-PTR and direct-PTR measurements, providing automated acquisition of both online isomer-resolved data without sacrificing high time resolution detection.
- Innovative VUV ionization cell provides exceptional sensitivity and stability, without humidity dependence.
- GC thermal desorption preconcentration increases system sensitivity while the GC preseparation enhances compound resolution and aids interpretation of complex spectra.
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Low detection limits: < 1 - 5 ppt (10 min) GC-PTR;
50 ppt (1 min) direct-PTR detection. -
Low power (< 500 W, typical) and compact footprint
(65 x 50 x 55 cm). - Fully automated analysis software provides real-time processing for a faster, more efficient data output.
Compact GC-PTR Advantages
- Field-deployable. Compact, robust design makes advanced, research-grade measurements possible in challenging and remote environments.
- Fully automated switching between GC-PTR and direct-PTR measurements, providing automated acquisition of both online isomer-resolved data without sacrificing high time resolution detection.
- Innovative VUV ionization cell provides exceptional sensitivity and stability, without humidity dependence.
- GC thermal desorption preconcentration increases system sensitivity while the GC preseparation enhances compound resolution and aids interpretation of complex spectra.
-
Low detection limits: < 1 - 5 ppt (10 min) GC-PTR;
50 ppt (1 min) direct-PTR detection. -
Low power (< 500 W, typical) and compact footprint
(65 x 50 x 55 cm). - Fully automated analysis software provides real-time processing for a faster, more efficient data output.
Exemplary data demonstrating > 4 weeks of unattended ambient measurements in Thun, Switzerland. Here we show the direct and speciated detection of monoterpines.
The Compact TD-GC-PTR_TOF-MS offers both high-time resolution detection and chemical resolution via pseudo-continuous GC separation.