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The Cryo1 is an automated, liquid nitrogen-based, cryo-focusing system designed to allow isotopic analysis of low concentration compounds (500 PPBv CO2 or less).

As the gas passes through the system, the sample is frozen into a two stage liquid nitrogen trap. Non-condensable gases are flushed out of the system by a stream of helium carrier gas. Water and other unwanted compounds / gases are removed by a series of membranes and optional chemical traps, this produces a purified and concentrated sample that can be passed directly into a GC or other chromatographic apparatus.

Unlike other commercial systems, the Cryo1 permits the direct syringe injection of headspace gas samples. This can be performed manually, or via a Gilson / GC Pal auto-sampler. Larger samples (250 ml +) can be introduced using the Large Volume Auto-Sampler.
The most common application of this facility is the analysis of samples who's concentration is too low for standard macro gas analysis (>150 PPM), but too high to warrant the expense of a full trace gas system (<800 PPT).

 
MultiGas trace configuration
Multigas macro configuration
A good example of this is the analysis of groundwater contaminants such as Volatile Organic Compounds (VOC's). Typically an aliquot of the sample headspace is extracted from a sample bottle and injected directly into a GC. For lower concentrations (the low PPM range) it becomes impossible to inject sufficient sample for subsequent isotopic analysis. The Cryo1 enables you to pass this limit, facilitating analysis to concentrations well below the safety thresholds set by legislative bodies such as the EPA.
Large volume autosampler
Water equilibration and carbonate analysis

 

 
    Cryo1 Injection port for direct syringe inject of gas samples
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