CN104713941A - Complete organic and inorganic explosive analyser - Google Patents
Complete organic and inorganic explosive analyser Download PDFInfo
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- CN104713941A CN104713941A CN201310690977.6A CN201310690977A CN104713941A CN 104713941 A CN104713941 A CN 104713941A CN 201310690977 A CN201310690977 A CN 201310690977A CN 104713941 A CN104713941 A CN 104713941A
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Abstract
The present invention relates to a mass spectrometry analysis instrument, specifically to a complete organic and inorganic explosive analyser, which comprises a thermal desorption injector, a sampling cloth, a nickel source, a low temperature plasma ionization source and an analyzer, wherein the thermal desorption injector is provided with a carrier gas inlet and a sample gas outlet, the sampling cloth is arranged in the thermal desorption injector, the sample on the sampling cloth is injected after thermal desorption, and the nickel source, the low temperature plasma ionization source and the analyzer are sequentially arranged on the gas path on the rear end of the sample gas outlet of the thermal desorption injector. According to the present invention, with the two ionization modes such as the low temperature plasma ionization source and the nickel source, the organic and inorganic explosives can be completely detected; the ionization efficiency and the detection sensitivity of the explosives capable of ionizing the two ionization sources can be improved; and the doped gas is added to the carrier gas or low temperature plasma gas ionization discharge gas, such that the reaction reagent ions in the ionization source can be changed, and the selectivity and the specificity of the explosive detection can be improved.
Description
Technical field
The present invention relates to mass spectrometer, specifically a kind of organic and inorganic explosive multianalysis instrument.The present invention, can the organic and inorganic explosive of complete detection by low temperature plasma ionization source and two kinds, nickel source ionization mode; For the explosive that two kinds of ionization sources can ionize, ionizing efficiency and detection sensitivity can be improved; In the discharge gas of carrier gas or low temperature plasma ionization source, add impurity gas, the reaction reagent ion in ionization source can be changed, improve selectivity and the specificity of explosive detection, be conducive to the qualitative analysis of explosive.
Background technology
Low temperature plasma ionization source, based on dielectric barrier discharge principle, utilizes He, Ar, N
2, air etc. as discharge gas, inside and outside two electrodes of glass tube apply radio-frequency voltage just can there is dielectric barrier discharge, produces low temperature plasma, utilizes low temperature plasma can ionized sample.Low temperature plasma ionization source is applied to explosive detection, shows highly sensitive and without the need to sample pre-treatments, the explosive in direct ionization complex matrices, and can the superior performance such as explosive on direct ionization insulator and conductive surface.In the discharge gas of low temperature plasma ionization source, add reactant gas as halogenated alkane and tetrafluoroacetate etc., new explosive product ion can also be formed, improve selectivity and the specificity of explosive detection, be conducive to the qualitative analysis of explosive.But low temperature plasma ionization source is mainly used in ionization organic explosive substance, when can not ionize inorganic explosive or ionize inorganic explosive, ionizing efficiency is lower.
Nickel source is a kind of ionization source of highly sensitive, high stability.Nickel source, as the conventional ionization source of ion mobility spectrometry, is widely used in the detection of explosive, and is suitable for very much ionizing inorganic explosive.When adopting nickel source ionization explosive, in sample carrier gas is as air, add impurity gas as methylene chloride, O
3deng, the reaction reagent ion in nickel source can be changed, obtain different explosive product ions, and then improve specificity and the sensitivity of explosive detection, be conducive to the qualitative analysis of explosive.
Thus, the present invention devises a kind of organic and inorganic explosive multianalysis instrument, ionizes mode by low temperature plasma ionization source and two kinds, nickel source, can the organic and inorganic explosive of complete detection; For the explosive that two kinds of ionization sources can ionize, ionizing efficiency and detection sensitivity can be improved; In the discharge gas of carrier gas or low temperature plasma ionization source, add impurity gas, the reaction reagent ion in ionization source can be changed, improve selectivity and the specificity of explosive detection, be conducive to the qualitative analysis of explosive.
Summary of the invention
The object of the present invention is to provide a kind of organic and inorganic explosive multianalysis instrument.
For achieving the above object, the technical solution used in the present invention is:
A kind of organic and inorganic explosive multianalysis instrument, comprises Thermal desorption injector, sampling cloth, nickel source, low temperature plasma ionization source and analyzer, is provided with carrier gas inlet and sample gas outlet on Thermal desorption injector;
Sampling placement in Thermal desorption injector, sampling cloth on sample sample introduction after Thermal desorption;
Carrier gas flows into from the carrier gas inlet of Thermal desorption injector, and carrier band sample molecule flows out from sample gas outlet; Nickel source is provided with in the gas circuit of the sample gas outlet rear end of Thermal desorption injector; Low temperature plasma ionization source is provided with in the gas circuit of rear end, nickel source; Analyzer is provided with in the gas circuit of low temperature plasma ionization source rear end.
Thermal desorption injector carries out contact heating by thermometal block to sample, or carries out noncontact heating by heating lamp to sample.
Described carrier gas is a kind of in air or nitrogen or is the combination gas of two kinds of gases.
Behind nickel source and the ionization of low temperature plasma ionization source, analyzer analysis is flowed into from Thermal desorption injector Thermal desorption sample molecule out; Described analyzer is mass analyzer or ion mobility spectrometry.
Beneficial effect of the present invention is: the organic and inorganic explosive multianalysis instrument of the present invention's design, ionizes mode by low temperature plasma ionization source and two kinds, nickel source, can the organic and inorganic explosive of complete detection; For the explosive that two kinds of ionization sources can ionize, ionizing efficiency and detection sensitivity can be improved; In the discharge gas of carrier gas or low temperature plasma ionization source, add impurity gas, the reaction reagent ion in ionization source can be changed, improve selectivity and the specificity of explosive detection, be conducive to the qualitative analysis of explosive.
Accompanying drawing explanation
Fig. 1 is the structural representation of organic and inorganic explosive multianalysis instrument of the present invention.
Wherein, 1-Thermal desorption injector; 2-carrier gas inlet; 3-sample gas exports; 4-samples cloth; 5-nickel source; 6-low temperature plasma ionization source; 7-analyzer.
Embodiment
As shown in Figure 1, a kind of organic and inorganic explosive multianalysis instrument, comprises Thermal desorption injector 1, sampling cloth 4, nickel source 5, low temperature plasma ionization source 6 and analyzer 7, is provided with carrier gas inlet 2 and sample gas outlet 3 on Thermal desorption injector 1;
Sampling cloth 4 is placed in Thermal desorption injector 1, and the material of sampling cloth 4 is teflon, the explosive sample sample introduction after Thermal desorption on sampling cloth 4;
Embodiment 1
Thermal desorption injector 1 carries out noncontact heating by halogen par heating lamp LCB-50 to sample, and the distance between heating lamp and sampling cloth 4 is 35mm.
Carrier gas flows into from the carrier gas inlet 2 of Thermal desorption injector 1, and carrier band sample molecule flows out from sample gas outlet 3; Carrier gas is pure dry air, and flow rate of carrier gas is 100-500mL/min.
The gas circuit exporting 3 rear ends in the sample gas of Thermal desorption injector 1 is provided with nickel source 5; The distance that nickel source 5 and sample gas export 3 is 15mm.
Low temperature plasma ionization source 6 is provided with in the gas circuit of rear end, nickel source 5; Low temperature plasma ionization source 6 is 10mm with the distance in nickel source 5.Low temperature plasma ionization source 6 adopts external diameter to be that 6mm, the thick glass tube for 1mm are as medium, glass tube overcoat has internal diameter to be 6.1mm, thick in 0.1mm, the long stainless steel cylinder for 16mm are as radio frequency high tension electrode, external diameter is had to be that 1.58mm, the long round metal mast for 100mm are as ground electrode in glass tube, applying frequency is between electrodes 25KHz, and peak-to-peak value is 2KV
p-pradio-frequency voltage; Discharge gas is He gas, and flow is 0.2-1L/min; Can select to add the impurity gas such as methylene chloride, water vapor in He gas, improve specificity and the sensitivity of explosive detection.
Ion trap mass spectrometry device 7 is provided with in the gas circuit of low temperature plasma ionization source 6 rear end; After nickel source 5 and low temperature plasma ionization source 6 ionize, flow into ion trap mass spectrometry device 7 from Thermal desorption injector 1 Thermal desorption out sample molecule to analyze.
Embodiment 2
Thermal desorption injector 1 carries out contact heating by hot stainless steel metal block to sample.
Carrier gas flows into from the carrier gas inlet 2 of Thermal desorption injector 1, and carrier band sample molecule flows out from sample gas outlet 3; Carrier gas is pure dry air, and flow rate of carrier gas is 100-500mL/min, can select to add methylene chloride, O in atmosphere
3deng impurity gas, improve selectivity and the specificity of explosive detection.
The gas circuit exporting 3 rear ends in the sample gas of Thermal desorption injector 1 is provided with nickel source 5; The distance that nickel source 5 and sample gas export 3 is 15mm.
The gas circuit exporting 3 rear ends in the sample gas of Thermal desorption injector 1 is provided with nickel source 5; The distance that nickel source 5 and sample gas export 3 is 15mm.
Low temperature plasma ionization source 6 is provided with in the gas circuit of rear end, nickel source 5; Low temperature plasma ionization source 6 is 10mm with the distance in nickel source 5.
Ion mobility spectrometry analyzer 7 is provided with in the gas circuit of low temperature plasma ionization source 6 rear end; After nickel source 5 and low temperature plasma ionization source 6 ionize, flow into ion mobility spectrometry analyzer 7 from Thermal desorption injector 1 Thermal desorption out sample molecule to analyze.
Claims (4)
1. an organic and inorganic explosive multianalysis instrument, is characterized in that:
Comprise Thermal desorption injector (1), sampling cloth (4), nickel source (5), low temperature plasma ionization source (6) and analyzer (7), on Thermal desorption injector (1), be provided with carrier gas inlet (2) and sample gas outlet (3);
Sampling cloth (4) is placed in Thermal desorption injector (1), the sample sample introduction after Thermal desorption in sampling cloth (4);
Carrier gas flows into from the carrier gas inlet (2) of Thermal desorption injector (1), and carrier band sample molecule flows out from sample gas outlet (3); Nickel source (5) is provided with in the gas circuit of sample gas outlet (3) rear end of Thermal desorption injector (1); Low temperature plasma ionization source (6) is provided with in the gas circuit of nickel source (5) rear end; Analyzer (7) is provided with in the gas circuit of low temperature plasma ionization source (6) rear end.
2. explosive multianalysis instrument according to claim 1, is characterized in that:
Thermal desorption injector (1) carries out contact heating by thermometal block to sample, or carries out noncontact heating by heating lamp to sample.
3. explosive multianalysis instrument according to claim 1, is characterized in that:
Described carrier gas is a kind of in air or nitrogen or is the combination gas of two kinds of gases.
4. explosive multianalysis instrument according to claim 1, is characterized in that:
Behind nickel source (5) and low temperature plasma ionization source (6) ionization, flow into analyzer (7) from Thermal desorption injector (1) Thermal desorption sample molecule out to analyze; Described analyzer (7) is mass analyzer or ion mobility spectrometry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310690977.6A CN104713941B (en) | 2013-12-13 | 2013-12-13 | A kind of organic and inorganic comprehensive analyzer of explosive |
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| CN201310690977.6A CN104713941B (en) | 2013-12-13 | 2013-12-13 | A kind of organic and inorganic comprehensive analyzer of explosive |
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| CN104713941A true CN104713941A (en) | 2015-06-17 |
| CN104713941B CN104713941B (en) | 2017-12-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106645770A (en) * | 2015-11-03 | 2017-05-10 | 中国科学院大连化学物理研究所 | An on-line detector capable of continuous sample injection and application thereof |
| CN109308990A (en) * | 2018-09-25 | 2019-02-05 | 公安部第三研究所 | Sampling system for ionic migration spectrum detector |
| CN111105980A (en) * | 2018-10-25 | 2020-05-05 | 中国科学院大连化学物理研究所 | Flash thermal analysis-time-delay purging sample introduction method for drug mixture detection |
| CN117147673A (en) * | 2023-10-24 | 2023-12-01 | 广州源古纪科技有限公司 | Method, system and equipment for detecting breath mass spectrum |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645770A (en) * | 2015-11-03 | 2017-05-10 | 中国科学院大连化学物理研究所 | An on-line detector capable of continuous sample injection and application thereof |
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| CN111105980A (en) * | 2018-10-25 | 2020-05-05 | 中国科学院大连化学物理研究所 | Flash thermal analysis-time-delay purging sample introduction method for drug mixture detection |
| CN111105980B (en) * | 2018-10-25 | 2021-01-26 | 中国科学院大连化学物理研究所 | Flash thermal analysis-time-delay purging sample introduction method for drug mixture detection |
| CN117147673A (en) * | 2023-10-24 | 2023-12-01 | 广州源古纪科技有限公司 | Method, system and equipment for detecting breath mass spectrum |
| CN117147673B (en) * | 2023-10-24 | 2024-01-26 | 广州源古纪科技有限公司 | Method, system and equipment for detecting breath mass spectrum |
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| CN104713941B (en) | 2017-12-19 |
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