Continuous monitor for detecting aerosol sample

A monitoring instrument and gas detection technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as failure to achieve, and achieve the effects of fast measurement speed, low operating costs, and high cost performance.

Inactive Publication Date: 2012-05-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct online monitoring and analysis of aerosols in the atmosphere has not yet been realized.

Method used

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  • Continuous monitor for detecting aerosol sample
  • Continuous monitor for detecting aerosol sample
  • Continuous monitor for detecting aerosol sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] image 3 The ion mobility spectrogram of the sampling cloth added with nicotinamide dopant additive is detected by ion mobility spectrometry. Accurately weigh 10g of nicotinamide and dissolve it in 500mL of purified water, put a clean 5-7m long sampling cloth into it and ultrasonically clean it for 10min, take it out and dry it in an oven at 105-120°C (about 1 hour) before installing and using it.

[0038] It can be seen from the figure that the nicotinamide dopant additive on the sampling cloth in the positive ion mode has covered the reagent ion peak, which provides a good detection background signal peak for the sample detection in the positive ion mode. The reagent ion peak was at 4.6ms, while the characteristic peak of the nicotinamide dopant additive appeared at 5.3ms.

Embodiment 2

[0040]Figure 4 shows the ion mobility spectrum of lidocaine chlorhexidine aerosol detected by ion mobility spectrometry, and the nicotinamide dopant additive has been added to the sampling cloth. The lidocaine chlorhexidine aerosol is sprayed into the atmosphere around the environment, and the instrument automatically takes samples for analysis and detection. It can be seen from the figure that the lidocaine chlorhexidine aerosol has been well detected, and the characteristic peak of the lidocaine chlorhexidine aerosol is at 7.2ms. 4(a) and (b) in the figure are different moments of signal acquisition respectively. (a) The characteristic peak of the nicotinamide dopant additive is covered by the characteristic peak of the lidocaine chlorhexidine aerosol in the figure. (b) In the figure, the characteristic peaks of the nicotinamide dopant additive and the characteristic peaks of the lidocaine and chlorhexidine aerosol co-exist.

Embodiment 3

[0042] Figure 5 The ion mobility spectrogram of the aerosol simulant was detected by ion mobility spectrometry, and the nicotinamide dopant additive had been added to the sampling cloth. The concentration of aerosol simulant in the experiment is 2mg / m 3 . The aerosol simulants are well detected, and the reagent ion peaks have been covered by the characteristic peaks of dopant additive and aerosol poison simulants. The peak of the dopant additive is at 5.3ms, while the characteristic peak of the aerosol simulant is at 9.0ms.

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Abstract

The invention discloses a continuous monitor for detecting an aerosol sample, and relates to a continuous monitor for online detection of an aerosol sample by utilizing an ion mobility spectrometry technique. The development of the monitor is based on the ion mobility spectrometry technique; and an ion mobility spectrometry analysis method is used as detection means. The instrument employs air as a sample carrier gas and a drift gas, and a set of purifying and drying gas circuit with a complete system, as well as a uniform field ion mobility tube. An impact type aerosol sampling device is used for sampling samples from atmosphere and gathering the samples to a piece of polytetrafluoroethylene high temperature resistant sampling cloth which is processed specially; the sampling cloth which employs crawler-type transmission is used for gasifying the samples by thermal resolution, and then the samples are carried by the carrier gas to enter the monitor for online detection and analysis. Interval sampling or continuous sampling can be configured in sampling time; usually, the interval sampling time is set to 10-30 s; the time consumption for analyzing the sample once is lower than 60 s; the sensitivity is very high; and the related standard for analysis and detection is achieved. A software control instrument can be used for realizing warning patterns of different aerosol samples.

Description

technical field [0001] The invention relates to a continuous monitor for on-line detection of aerosol samples using ion mobility spectrometry technology. [0002] The aerosol sample continuous monitor, specifically, directly monitors the aerosol samples in the atmospheric environment. This method is based on the ion mobility spectrometry technology, using the ion mobility spectrometer as the analysis method, and the sampling and analysis time can be set. The sampling time is 10-30s, and it takes less than 60s to analyze a sample, with high sensitivity. Background technique [0003] Ion Mobility Spectrometry (IMS) technology is a separation and detection technology that appeared in the 1970s. Compared with traditional mass spectrometry and chromatography instruments, it has the characteristics of simple structure, high sensitivity, fast analysis speed and reliable results. It can detect trace substances in the atmospheric environment and is suitable for on-site use. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
Inventor 李海洋仓怀文王新渠团帅王祯鑫鞠帮玉赵琨王卫国
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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