Sample injection device

Abstract

The invention relates to the field of sample injection devices, and discloses a sample injection device. The sample injection device comprises a sampler, a gas suction pump, adsorbers, a piston cylinder body and a resolving cylinder body, wherein the resolving cylinder body is provided with a resolving cavity and is further provided with a carrier gas inlet, a carrier gas sweeping / dividing outlet and an analyzer interface, which are communicated with the resolving cavity; a heating film and a temperature sensor are arranged on the outer wall of the resolving cylinder body; two piston cavities are formed in the piston cylinder body; each adsorber is mounted in each piston cavity; the piston cylinder body is mounted on the resolving cylinder body; the two piston cavities are communicated with the resolving cavity; a sample gas inlet and a gas suction pump opening which are communicated with the two piston cavities are formed in the piston cylinder body; the sample gas inlet is connected with the sampler; the gas suction pump opening is connected with the gas suction pump; the adsorbers comprise adsorption screens and piston rods which are connected; the adsorption screens are used for storing adsorbents; the piston rods are mounted in the piston cavities in a sliding manner; the adsorption screens can be simultaneously communicated with the sample gas inlet and the gas suction pump opening.

Description

technical field [0001] The invention relates to the field of sampling devices, in particular to a sampling device Background technique [0002] Ion mobility spectrometer (IMS) is one of the mainstream trace detection equipment in the world at present. IMS technology mainly separates and identifies samples based on the difference in the mobility of different ions under the action of a weak electric field. It has a simple structure and high sensitivity. , fast analysis speed and reliable results, etc. It can quickly detect drugs, explosives, poisonous gas and biochemical gases online, and is widely used in military (chemical warfare agent monitoring), civil (anti-terrorism, anti-drug, etc.) and many other fields. It plays a huge role in national security, maintaining social stability, strengthening national defense, and maintaining the national economy and people's livelihood. However, when a single IMS is used to detect a complex mixture of multiple components, it is prone t...

AI Technical Summary

Problems solved by technology

Although it discloses and solves a rapid detection method suitable for gas samples and surface-contaminated samples without unpacking, its adsorption effect is not ideal enough to easily cause false positives and false alarms.

[0004] In summary, the existing IMS and GC sampling and injection technologies are not suitable for rapid on-site detection by GC-IMS without unpacking, and there is an urgent need for a sampling device that can be used without unpacking

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