Online mass spectrum sampling analysis system for measuring high-humidity gas sample

By combining a low-temperature cold trap and adsorption packing for water removal, and employing an inert coating and selective permeation membrane, the problems of moisture contamination and condensation blockage of high-humidity gas samples in the mass spectrometry system were solved, achieving efficient and stable gas analysis.

CN121364232APending Publication Date: 2026-01-20PANNA (CHANGZHOU) INSTR CO LTD
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Patent Information

Application Number
CN202511636095.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-10
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

When processing high-humidity gas samples, existing online mass spectrometry systems are prone to moisture entering the vacuum chamber and contaminating components, shortening their lifespan, affecting ionization efficiency and detection accuracy. Furthermore, condensation can cause pipeline blockage, requiring frequent maintenance. Existing water removal solutions are inefficient or require frequent replacement, which affects the accuracy of analytical results.

Method used

Combining low-temperature cold trap pre-water removal with adsorption packing for deep water removal, key components are treated with an inert coating, selective permeation membranes and pressure and flow stabilization modules are introduced, integrating sampling, pretreatment, detection and data processing, and equipped with a reverse cleaning module to extend gas residence time and ensure stable mass spectrometry analysis conditions.

Benefits of technology

It effectively removes free water from high-humidity gases, improves detection repeatability and sensitivity, reduces maintenance frequency, ensures the accuracy and stability of mass spectrometry analysis, and lowers maintenance costs.

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Abstract

The invention discloses an on-line mass spectrum sampling analysis system for measuring a high-humidity gas sample, and relates to the technical field of gas mass spectrum detection, the analysis system comprises an on-line sampling module, a primary water removal module, a secondary water removal module, a sample pretreatment module, a sample introduction interface module, a mass spectrum detection module and a reverse cleaning module, the on-line sampling module is communicated with the primary water removal module through a pipeline, and the primary water removal module is communicated with the secondary water removal module through a pipeline. According to the method, low-temperature cold trap water pre-removal and adsorption filler deep water removal are combined for the first time, and efficiency and thoroughness are both considered; inert coating treatment is performed on the inner walls of key components, so that adsorption and reaction of active components are reduced; a selective permeable membrane is introduced on the basis of water removal, so that the efficiency of the target component entering the mass spectrum is further improved; sampling, preprocessing, detection, data processing and alarming are integrated, and automation and remote monitoring are achieved. After secondary water removal, the gas enters the pressure and flow stabilizing module immediately, so that humidity rebound is reduced, and the stability of mass spectrometry conditions is ensured.
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