COOLING-ASSISTED INSIDE NEEDLE CAPILLARY ADSORPTION TRAP DEVICE FOR ANALYZING COMPLEX SOLID SAMPLES USING NANO-SORBENT

摘要

A cooling-assisted inside needle capillary adsorption trap device for sampling and delivering volatile and semi-volatile analytes to an analytical device is disclosed. The device includes an inside needle capillary adsorption trap having a first end and a second end and a side aperture located between the first and second ends. The side aperture enables entering the carrier gas into the INCAT and flowing upon the surface of the sorbent (when injected into the GC injector) for complete releasing and eluting of the analytes from the interior surface of the needle. A sorbent is multiwall carbon nanotube/polyaniline and is coated onto the interior surface of the needle between the second end and the side aperture to entrap an analyte within a sample. The cooling-assisted inside needle capillary adsorption trap device also includes a cooling device configured to cool the sorbent.

主权项

1. A cooling-assisted inside needle capillary adsorption trap system comprising:
a needle including a first end and a second end and a side aperture positioned between the first end and the second end, and the side aperture being configured to enter the carrier gas into an interior surface of the needle INCAT for complete releasing and eluting of the analytes from the interior surface of the needle; a MWCNT/PANI nanocomposite sorbent coated into the interior surface of the needle between the second end and the side aperture and configured to entrap the analytes within a sample received within the interior space of the needle; and a cooling device configured to cover and cool the sorbent and includes an inner tube and an outer tube, the outer tube having a diameter larger than the inner tube and including a first aperture and a second aperture; a first capillary tube coupled to the first aperture and configured to be an inlet channel for a coolant fluid for cooling the sorbent; and a second capillary tube coupled to the second aperture and configured to be an outlet channel for the coolant fluid, wherein the inner tube is approximately 2.5 cm in length and 0.5 cm and 0.6 cm in inner and outer diameters, respectively, and the outer is approximately 2 cm in length and 0.8 cm and 1.0 cm in inner and outer diameter respectively.