A sampling desorption device
A technology for desorption and sampling needles, applied in the field of mass spectrometer samplers, can solve the problems of probes being deformed by force, easy to be polluted, and affecting detection accuracy, so as to improve accuracy, ensure accuracy, and reduce impact
Active Publication Date: 2021-09-21
山东安准智能科技有限公司
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Problems solved by technology
However, after the test is completed, it is generally simply burned, and then the next test is performed, which is difficult to avoid causing interference to subsequent tests
Moreover, there is no fixed container for holding the probe. When placed casually, on the one hand, it is easy to cause the force deformation of the probe, and on the other hand, it is easy to be polluted, which affects the accuracy of detection.
In addition, when this method is heated and desorbed, a certain flow rate of carrier gas needs to be introduced. The inventors found that due to the low temperature of the carrier gas, the heating and desorption effect of the pesticide on the probe will be affected during the feeding process, which in turn will affect the quality of agricultural products. Accuracy of Surface Pesticide Detection
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[0055] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0056] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0057] Such as figure 1 As shown, a sampling desorption device includes a sampling section and a desorption sec...
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The invention discloses a sampling and desorption device, which includes a sampling section and a desorption section, wherein the sampling section includes a first housing, a push handle, a piston, a sampling needle clamping structure and a sampling needle, and the first housing is Columnar structure, the piston is movably installed inside the first housing; the push handle and the clamping structure of the sampling needle are respectively installed on both sides of the piston, and one end of the sampling needle is detachably fixed in the clamping structure of the sampling needle; the sampling needle, the push handle Parallel to the axis of the first housing, the sum of the axial lengths of the piston and the sampling needle is less than the axial length of the first housing, and the sum of the axial lengths of the push handle, piston and sampling needle is greater than the axis of the first housing Lengthwise; the end of the first casing close to the sampling needle is matched with the desorption section, and the desorption section provides a space for accommodating the sampling needle and performing heating and desorption.
Description
technical field [0001] The invention belongs to the technical field of mass spectrometer samplers, and in particular relates to a sampling and desorption device. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, there are many methods for the detection of pesticide residues in agricultural products. Among them, the following methods are more commonly used: the first is to use instruments such as liquid chromatography or gas chromatography, and the samples to be detected have to go through complicated pretreatment steps. For example, first crush the agricultural product sample, add solvent for extraction, inject the extract into the activated solid phase extracti...
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IPC IPC(8): H01J49/04
CPCH01J49/0409H01J49/0468
Inventor 孙辰煜杨峰贾宜超王曙光祝凡平
Owner 山东安准智能科技有限公司