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Non-contact type heating assisted thermal desorption sample injection apparatus of online mass spectrum

A non-contact, sampling device technology, applied in the direction of measuring devices, analyzing materials, and material analysis through electromagnetic means, can solve the problems of long sample analysis time, affecting detection sensitivity, low sample volume, etc., and achieve power consumption Low, improve the detection sensitivity, the effect of high sample concentration

Inactive Publication Date: 2014-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

There are many types of thermal desorption sampling devices on the market today, but these sampling devices are large in size and take a long time for sample analysis, resulting in low injection volume and affecting the final detection sensitivity.

Method used

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  • Non-contact type heating assisted thermal desorption sample injection apparatus of online mass spectrum
  • Non-contact type heating assisted thermal desorption sample injection apparatus of online mass spectrum

Examples

Experimental program
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Embodiment Construction

[0025] Such as figure 1 As shown, a non-contact heating-assisted thermal desorption sampling device for online mass spectrometry, including a heating lamp 1, a sample substrate 2, an atmospheric pressure ionization source 3 and a mass spectrometer;

[0026] The heating lamp 1 is located directly above the sample substrate 2, and heats the sample spot with a diameter of 1mm on the sample substrate 2. The heating lamp 1 is a halogen beam heating lamp LCB-50. The heating lamp has a light focusing concave mirror. The focus spot diameter is 2mm, so no need to set the focus lens 5 again. The sample substrate 2 is a polytetrafluoroethylene sampling cloth, the distance between the sample substrate 2 and the heating lamp 1 is 35mm (that is, the focal length of the halogen beam heating lamp LCB-50), and the heating method of the heating lamp 1 to the sample is non-contact Heating by pulse heating, the heating time is 3s, the gaseous molecules from the thermal analysis of the sample are...

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Abstract

The invention provides a non-contact type heating assisted thermal desorption sample injection apparatus of an online mass spectrum. The apparatus comprises a heating lamp, a focusing lens, a sample substrate, an atmospheric pressure ionization source and a mass spectrometer. According to the present invention, the heating lamp is adopted to perform non-contact type heating so as to provide advantages of rapid heating, no sample residue, low power consumption and the like; and the heating lamp is adopted to perform non-contact type heating on the sample so as to increase the saturated vapor pressure of the large solid sample, such that the ionization efficiency is increased, and the signal strength of the sample is increased by about one magnitude order.

Description

technical field [0001] The invention relates to a mass spectrometry analysis instrument, in particular to a non-contact heating-assisted thermal analysis sampling device for online mass spectrometry. The device uses a heating lamp to heat the sample in a non-contact manner, which can increase the saturated vapor pressure of the solid sample, thereby improving the ionization efficiency and increasing the signal intensity of the sample by about an order of magnitude. Background technique [0002] Thermal desorption injection is a common injection method for mass spectrometry, gas chromatography, and ion mobility spectrometry. Thermal desorption sampling is a sampling method in which solid or liquid samples are desorbed from the substrate by heating and enter the analytical instrument for detection. [0003] The commonly used heating methods for thermal analysis sample injection include: metal block heating, laser heating, Curie point heating, etc. The heating speed of the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N27/626
Inventor 李海洋陈文东侯可勇王祯鑫赵无垛李芳龙
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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