A cryo-trapping temperature at -196 ˚C in GC Compact and energy saving design with safety features Capillary column

Background of development The thermal desorption analysis and headspace analysis require a considerably long time for sample introduction. Highresolution separation analysis of low boiling point compounds can be easily achieved by cryo-trapping the compounds with a narrow bandwidth, followed by rapid thermal desorption. For this purpose, the MicroJet Cryo-Trap (MJT-1030Ex), a cryo-trapping system for pyrolysis GC analysis, has been supplied to the market over ten years. The new model, the MicroJet Cryo-Trap (MJT-2030E), has the same fundamental performance as the previous model, yet with much...

Operation principle and flow diagram Newly designed tip of liquid nitrogen feed tube. Flow controller Pyrolyzer or other devices MicroJet tube Nitrogen cylinder In this system, nitrogen gas is liquefied by flowing about 3 to 7 L/min through a heat exchange coil immersed in liquid nitrogen and is blown as a jet flow against the head of the separation column in the GC oven to cool the local area where the analytes are trapped. Then the jet flow is stopped instantly by closing the solenoid valve, and at the same time the circulating heated air in the oven rapidly heats the cooled section of the...

Analysis examples using MicroJet Cryo-Trap Headspace analysis of red wine A headspace analysis of red wine using MicroJet Cryo-Trap is shown in Fig. 6. A one mL sample from the headspace gas of a red wine bottle was injected directly into the GC injector. The volatiles were cryo-trapped at the head of a separation column before starting GC/MS analysis. Typical compounds found in wine are observed. Ethanol Ethyl acetate Isoamyl alcohol Isoamyl acetate Glycerol Analytical conditions 0 ・ Cryo-trapping temperature: -196 ºC ・ GC oven: 40 – 280 ºC (20 ºC/min, 5 min hold) ・ Separation column: UA+-1...