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Plasma source ion synergic checking ion transfer spectrometer

A plasma source and plasma technology, which is applied in the field of ion mobility spectrometers for positive and negative ion cooperative detection of ion sources, can solve the problems of simultaneous detection of explosives, drugs and organic substances, and achieve fast measurement speed, no radioactivity, and high detection sensitivity Good results

Active Publication Date: 2009-01-07
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Commonly used ion mobility spectrometers can only work under a single ion polarity, and the instrument cannot simultaneously detect explosives, drugs and organic substances in the same sample

Method used

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  • Plasma source ion synergic checking ion transfer spectrometer
  • Plasma source ion synergic checking ion transfer spectrometer
  • Plasma source ion synergic checking ion transfer spectrometer

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Experimental program
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Embodiment Construction

[0035] see figure 1 .

[0036] Plasma source positive and negative ion cooperative detection ion mobility spectrometer, the difference from traditional ion mobility spectrometer is that it uses a non-radioactive plasma source as the ion source of the instrument, and can perform positive and negative cooperative measurement. It includes ion migration tube, gas purification drive part, power supply part, signal detection unit and data processing and display device.

[0037] The following takes the measurement of explosives as an example to introduce the specific detection methods of the instrument.

[0038]First, use sampling paper to wipe the surface of the object to be tested, then feed the sampling paper into the sampling port of the instrument, and the sampling port heats the sampling paper to vaporize the explosives attached to the surface of the sampling paper at high temperature. The material components enter the reaction area in the ion transfer tube driven by the carr...

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Abstract

The invention discloses a cooperative detection ion mobility spectrometer of the positive ion and negative ion of a plasma source; the plasma source has a positive metal electrode and a negative metal electrode, and voltage is imposed between the two electrodes so as to generate the plasma; the electrode is of the shape of a needle, rod, plate, cylinder or net, the discharging voltage is hundreds to thousands and the current is microampere to milliampere; the signal intensity of the ion source is large, the positive ion works cooperatively with the negative ion, therefore, the detection sensitivity is good, the resolution is high, the measurement speed is fast, the meter has small volume and simple operation and is applicable to fast online detection and alarming of trace amount of explosive, drugs and organic matters; compared with the radioactive source of the traditional ion mobility spectrometer, the plasma source has the advantage of no radioactivity, the spectrometer is convenient in use, maintenance and management and has high detection sensitivity and detection accuracy.

Description

Technical field: [0001] The present invention relates to a plasma source positive and negative ion cooperative detection ion mobility spectrometer, which is a detection device for separating substances by using the migration characteristics of ions in an electric field under atmospheric pressure. Background technique: [0002] The ion source commonly used in ion mobility spectrometry is a radioactive source 63 Ni, which has stable performance, small size, and no external power supply, but because of the use of radioactive substances, the purchase, use, maintenance, management and disposal of the instrument must comply with radioactive source management regulations, which increases the burden on users and limits the equipment. of widespread use. also, 63 The number density of ions generated by the Ni ion source is constant, generally in the hundreds of pA, resulting in limited detection sensitivity and dynamic range of Ni-IMS. The present invention uses a plasma source, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
Inventor 韩海燕郑培超李虎王鸿梅李建权沈成银徐国华江海河储焰南
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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