Rapid analysis device and method for ambient air volatile organic compounds

An organic compound and ambient air technology, applied in the field of environmental analysis, can solve the problems of complex ambient air collection methods and gas sample introduction methods, unsatisfactory continuous and rapid sampling analysis of gas samples, limiting qualitative and quantitative analysis, etc., to achieve the experimental process. Simple and fast, improve detection sensitivity, easy to operate

Active Publication Date: 2013-02-13
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ambient air collection method and gas sample introduction method of this method are relatively complicated, which is not ideal for the continuous and rapid sampling analysis of gas samples.
Therefore, Huang et al. (Huang G M, et al, J. Am. Soc. Mass Spectrom. 2010, 21:132) developed a portable mass spectrometer for analyzing ambient air. Although this device can solve the shortcomings of the above-mentioned technologies, it , the existing portable mass spectrometry technology uses one-dimensional mass spectrometry instead of tandem mass spectrometry, and cannot add internal standards when quantitatively analyzing gas samples, which limits the qualitative and quantitative analysis of ambient air samples by portable mass spectrometry

Method used

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  • Rapid analysis device and method for ambient air volatile organic compounds
  • Rapid analysis device and method for ambient air volatile organic compounds
  • Rapid analysis device and method for ambient air volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Rapid analysis of environmental smoke marker 3-vinylpyridine (3-EP).

[0040] The specific operation steps are as follows:

[0041]In this example, the ambient air collection bottle 1 is placed in the conference room after smoking, and after equilibrating for 5 minutes, it is tightly capped with the upper and lower bottle stoppers 1.2 and 1.3, and then transferred to the laboratory, and the ambient air is collected with a micro syringe 1.8 10 μL of deuterated acetone internal standard solution was injected into bottle 1, and the magnetic stirring rotor 1.7 was stirred for 3 min. The gas sample was passed through the gas switching valve (ie, sample introduction mechanism 2) through the capillary outlet of the ambient air collection bottle 1.9, and the gas sample was introduced into the bottle. The sample port 2.1, the mass spectrometer sample inlet port 2.2 and the mass spectrometer capillary sample port 3.1 are introduced into the mass spectrometer ion source, and after...

Embodiment 2

[0045] In this example, the ambient air collection bottle 1 is placed in the conference room after smoking, and sampling is performed every 10 minutes for 3 hours. After each sampling is equilibrated for 5 minutes, it is tightly capped with a bottle stopper, and then transferred to the laboratory. , inject 10 μL of deuterated acetone internal standard solution into the ambient air collection bottle 1 with a micro syringe 1.8, stir for 3 min with the magnetic stirring rotor 1.7, and pass the gas sample through the capillary outlet of the ambient air collection bottle through the sample introduction mechanism 1.9. Gas sample The injection port 2.1, the mass spectrometer injection connection port 2.2 and the mass spectrometer capillary injection port 3.1 are introduced into the mass spectrometer ion source, and after ionization, enter the mass spectrometer mass analyzer for analysis and detection.

[0046] Image 6 It is the change trend of 3-EP concentration in the conference ro...

Embodiment 3

[0048] Rapid analysis of four VOCs including acrylonitrile, crotonaldehyde, pyridine and quinoline in conference rooms after smoking.

[0049] The specific operation steps are as follows:

[0050] In this example, the ambient air collection bottle 1 was placed in the conference room after smoking, and after equilibrating for 5 minutes, it was tightly capped with a cork, then transferred to the laboratory, and 10 μL was injected into the ambient air collection bottle 1 with a microsyringe 1.8 Deuterated acetone internal standard solution, stir with magnetic stirring bar 1.7 for 3 min, gas sample is passed through the gas switching valve through the capillary outlet 1.9 of the ambient air collection bottle, the gas sample injection port 2.1, the mass spectrometer injection port 2.2 and the mass spectrometer The capillary inlet 3.1 is introduced into the mass spectrometer ion source, and after ionization, enters the mass spectrometer mass analyzer for analysis and detection.

[...

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Abstract

The invention discloses a rapid analysis device and method for ambient air volatile organic compounds. The rapid analysis device comprises an ambient air sampling bottle, a sample leading-in mechanism and a reformed atmosphere pressure chemical ionization tandem mass spectrometer. The rapid analysis method includes: using the ambient air sampling bottle to directly collect the ambient air, transferring the sampling bottle to a laboratory, directly leading the ambient air without concentration treatment into an ion source through an air manual switching four-way valve to be performed with rapid analysis through a reformed atmosphere pressure chemical ionization mass spectrometry / mass spectrometry (APCI-MS / MS). Compared with a traditional method for analyzing the volatile organic compounds in the ambient air, the ambient air sampling bottle and the sample leading-in mechanism in the method are simple in structure and convenient to operate, the iron source can achieve direct leading in of the air samples through the reformed APCI-MS / MS, the process from sample induction to data collection only needs several seconds, the sensitivity is high, the within-day precision and day repeatability are good, and the rapid analysis device and method are suitable for rapid analysis of the trace volatile organic compounds in the ambient air.

Description

technical field [0001] The present invention relates to the field of environmental analysis, specifically, a device and method for rapid analysis of volatile organic compounds in ambient air, which utilizes a modified atmospheric pressure chemical ionization (APCI) mass spectrometer to quickly analyze volatile organic compounds in ambient air. method. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are a large class of major gas phase pollutants in ambient air. More than 500 compounds have been identified, including alkanes, alkenes, aromatics, chlorinated aromatics, saturated and unsaturated aldehydes ketones, esters, haloalkanes and alcohols. Most volatile organic compounds are classified according to their physical and chemical properties (such as boiling point, vapor pressure, etc.). The World Health Organization defines VOCs as organic compounds that can be adsorbed by solid adsorbents and have a boiling point of 50-260 °C. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
Inventor 孙世豪蒋成勇王慧李鹏张启东毛健张建勋宗永立
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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