Thermal desorption instrument sample split-flow recovery system with reinspection function

By integrating storage, transportation, dilution, adsorption enrichment, thermal desorption, and cold trap sample introduction units into a thermal desorption instrument sample dilution and recovery system, the problem of analyzing high-concentration gas samples in cold trap detection devices has been solved, realizing automated and accurate full-process analysis and improving detection accuracy and sensitivity.

CN122448614APending Publication Date: 2026-07-24安徽海峰分析测试科技有限公司
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Patent Information

Application Number
CN202610880109.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-17
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing cold trap detection devices are prone to adsorbent overload and penetration when dealing with high-concentration gas samples, leading to distorted quantitative results and potential contamination of the cold trap and chromatographic system. Furthermore, there is a lack of automated processing methods.

Method used

A thermal desorption sample splitting and recovery system with re-examination function was designed, including a storage device, a transportation device, a splitting and dilution device, an adsorption enrichment unit, and a thermal desorption and cold trap injection unit. The system achieves full automation, and high-concentration samples can be adjusted online and quantitatively through the splitting and dilution device. The integrated adsorption enrichment and cold trap injection unit breaks through the upper limit of concentration and enables direct analysis over a wide concentration range.

Benefits of technology

It enables fully automated analysis of gas samples with a wide concentration range, avoiding human error, improving analytical accuracy and repeatability, and enhancing detection sensitivity and chromatographic peak quality.

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Abstract

The invention discloses a thermal desorption instrument sample split-flow recovery system with a reinspection function, and relates to the technical field of analytical chemical instruments, the thermal desorption instrument sample split-flow recovery system comprises a storage device, a transportation device, a split-flow dilution device, an adsorption enrichment unit and a thermal desorption and cold trap sample introduction unit, a sample tube in the storage device stores an analyte to be detected in gas; the transportation device is used for transporting and moving the sample tube; dilution gas is stored in the split-flow dilution device, the dilution gas is used for carrying out quantitative split-flow dilution on the analyte to be detected to form first split-flow gas, and the first split-flow gas is moved by the transportation device; the adsorption enrichment unit is used for adsorbing the first split-flow gas and is used for capturing and concentrating an analyte to be detected in the first split-flow gas; and the thermal desorption and cold trap sampling unit is used for desorbing the concentrated analyte to be detected and injecting the analyte into an analytical instrument. The problem that high-concentration gas cannot be effectively analyzed through cold trap detection in the prior art can be solved.
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