Preparation and delivery device of standard sample for calibrating trace analyzer

Abstract

The embodiment of the invention relates to a preparation and delivery device of a standard sample for calibrating a trace analyzer, in particular to a preparation and delivery device of a standard sample for calibrating a gas chromatography-ion mobility spectrometry joint instrument. The preparation and delivery device has the advantages that when the trace analyzer is calibrated, additional special tools and steps for preparing a test sample for calibrating are not needed, and the use of organic solvent and special spotting tools is also not needed; the carrying and use are simple and convenient, the storage and replacement of calibrating matters are convenient, and the safety, reliability and environment-friendly effects are realized.

Description

technical field [0001] The invention relates to the field of on-site detection of chemical substances, in particular to the calibration / calibration of measuring instruments, and more specifically to a standard sample calibration method for trace analysis instruments (especially gas chromatography-ion mobility spectrometry) Preparation and feeding unit. Background technique [0002] Ion mobility spectrometry (IMS) technology, as a technology for rapid trace detection of chemical substances in an atmospheric pressure environment, has extremely high sensitivity and response speed. However, compared with other existing detection techniques, IMS has some limitations: 1) It cannot handle chemical mixtures adequately, because the mobility difference between ions in complex mixtures in the ion source is not much different, which can lead to blurred IMS resolution or even produce Unresolved ion spectrum. Therefore, when the chemical interference of multiple components exists, IMS i...

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Problems solved by technology

However, compared with other existing detection techniques, IMS has some limitations: 1) It cannot handle chemical mixtures adequately, because the mobility difference between ions in complex mixtures in the ion source is not much different, which can lead to blurred IMS resolution or even produce unresolved ion spectrum

There are many problems in the above method for preparing and sending standard samples in the calibration / calibration process, for example: the standard sample solution needs to be prepared, and because the calibration substance added dropwise is small and volatile, it cannot be stored for a long time and can only be stored for a long time. On-site instant sampling; it is necessary to carry and use organic solutions, pipette guns, sampling test papers, etc., which is not safe, environmentally friendly, and wastes resources; and when it comes to GC-IMS coupling, the above schemes except for setting standard samples Not applicable to GC-IMS except branch circuit

As for the scheme of setting up another branch system, on the one hand, the complexity and volume of the instrument will be increased;

[0007] In summary, the standard sample preparation and feeding devices and methods in conventional IMS calibration / calibration are not suitable for GC-IMS coupled spectrometers, and there is no mention or report specifically for GC-IMS coupled spectrometers in the prior art. Apparatus and method for preparing and feeding standard samples for relative calibration of spectrometers

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