A device, method and substance detection device for increasing the concentration of volatile samples

Abstract

The invention discloses a device and method for increasing the concentration of a volatile sample. The device comprises a sample container and a storage cavity, wherein the sample container is sealedby a piston and connected to the storage cavity by a first gas circuit pipeline, the storage cavity is sealed by a piston and is connected to a detecting instrument by a second gas circuit pipeline, and when the piston in the sample container slides from an initial position along a first direction, the volume in the sample container increases, and the air pressure decreases, so that a volatile matter in a sample in the sample container volatilizes more intensely, and the gas concentration increases; the volatile matter is transported from the sample container into the storage chamber through the first gas circuit pipeline, and then is pressurized and compressed by the piston to increase the sample concentration; valves of the first gas circuit pipeline and the second gas circuit pipeline are controlled to open and close to control the volatile matter of the sample to be continuously or discontinuously delivered to the detecting instrument. The device can increase the gas concentrationof the volatile matter in the sample in a simple and effective manner without complicated pretreatment, and has a simple structure and high efficiency.

Description

technical field [0001] The invention relates to the field of mass spectrometry analysis, in particular to a device, method and substance detection device for increasing the concentration of volatile samples. Background technique [0002] Mass spectrometry is a fast and efficient material detection and analysis method, which is widely used in food and drug safety, space science exploration, public safety and other fields. Volatile organic compounds such as toluene, anisole, xylene, etc. are often dissolved in liquids or absorbed by solids. For example, when sampling and testing volatile organic compounds in waste liquid from chemical plants, distillation and other steps are required to gasify them and then use analytical instruments to detect their gas substances; sampling and testing of volatile organic compounds in soil requires collection by methods such as purge and trapping The VOC treatment process is complicated and time-consuming. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

For example, when sampling and testing volatile organic compounds in waste liquid from chemical plants, distillation and other steps are required to gasify them and then use analytical instruments to detect their gas substances; sampling and testing of volatile organic compounds in soil requires collection by methods such as purge and trapping The volatile organic compound treatment process is complicated and time-consuming

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