Method for detecting off-flavor substances from fugitive emission of pickles plant by adopting SPME (solid-phase microextraction)-off-flavor analysis system

A technology of fugitive emission and analysis system, applied in the direction of analyzing materials, measuring devices, material separation, etc., can solve the problems of poor sensitivity and selectivity, inability to accurately detect the fugitive emission of odorous substances in pickle factories, and great influence of human factors, etc. Effects of high sensitivity, reduced background matrix interference, improved selectivity and sensitivity

Inactive Publication Date: 2017-11-24
JIANGSU ENVIRONMENTAL MONITORING CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of cumbersome operation, greater influence by human factors, poor sensitivity and selectivity in the existing method for analyzing odorous substances in the atmosphere, so that

Method used

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  • Method for detecting off-flavor substances from fugitive emission of pickles plant by adopting SPME (solid-phase microextraction)-off-flavor analysis system
  • Method for detecting off-flavor substances from fugitive emission of pickles plant by adopting SPME (solid-phase microextraction)-off-flavor analysis system
  • Method for detecting off-flavor substances from fugitive emission of pickles plant by adopting SPME (solid-phase microextraction)-off-flavor analysis system

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Experimental program
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Effect test

Embodiment 1

[0033] A method of solid-phase microextraction-odor analysis system of this embodiment detects unorganized emission of odorous substances from pickle factories, the steps are as follows:

[0034] Step 1. Sample collection:

[0035] (a) Aging of solid-phase microextraction fibers: 65 μm PDMS / DVB solid-phase microextraction fibers are aged at the inlet of gas chromatography before use. The aging temperature is 250 ° C, and the volume flow rate of carrier gas is 1.5 ml / min. No spurious peaks appeared.

[0036] (b) Collection of unorganized emission of odorous substances from pickle factories: According to "Technical Specifications for Layout of Ambient Air Quality Monitoring Points (Trial)" (HJ 664-2013) and "Technical Guidelines for Monitoring Unorganized Emissions of Air Pollutants" (HJ / T 55-2000), taking into account meteorological conditions, industrial layout, population distribution, roads and other factors, the sampling point was determined around a pickle factory in Jiang...

Embodiment 2

[0050] The 50 / 30 μm PDMS-DVB-CAR solid-phase microextraction fiber was used to collect fugitive odor substances emitted from pickle plants. The 50 / 30μm PDMS-DVB-CAR was aged in the inlet of the gas chromatograph before use. The aging temperature was 270°C, the volume flow rate of the carrier gas was 1.5ml / min, and the aging time was 0.5h. After collecting at the sampling point for 30 minutes, and transporting it back to the laboratory, repeat the relevant analysis conditions and steps in Example 1 to obtain the concentration of odorous substances and analyze the main components that cause the odor.

[0051] The analytical inlet temperature of PDMS-DVB-CAR is 300°C, and the spectra of odorous substances in this embodiment are as follows figure 2 shown.

Embodiment 3

[0053] A 75 μm CAR-PDMS solid-phase microextraction fiber was used to collect fugitive odor substances emitted from pickle plants. The CAR-PDMS solid-phase microextraction fiber was aged in the inlet of the gas chromatograph before use. The aging temperature was 300°C, the volume flow rate of the carrier gas was 1.5ml / min, and the aging time was 1h. After collecting at the sampling point for 40 minutes, after transporting it back to the laboratory, repeat the relevant analysis conditions and steps in Example 1 to obtain the concentration of odorous substances and analyze the main components that cause odor. The spectrum of its odorous substances is as follows: image 3 shown.

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Abstract

The invention provides a method for detecting off-flavor substances from fugitive emission of a pickles plant by adopting an SPME (solid-phase microextraction)-off-flavor analysis system and belongs to the technical field of off-flavor analysis. According to the method, extraction is performed on the off-flavor substances from fugitive emission of the pickles plant with the SPME technology, and detection is performed on the basis of MRM method parameters and sensory information of Shimadzu Off-Flavor compounds configured in an off-flavor analysis system. With adoption of the SPME technology, sampling, extraction and concentration are integrated, the operation is simple and rapid, the defect that the detection selectivity and sensitivity of the conventional detector cannot be realized simultaneously is overcome by means of a GC-MS/MS technology, components causing off-flavor are judged accurately on the basis of the sensory information of flavor components in an off-flavor analysis database, the problem that off-flavor still exists when gas emission meets the standard during detection by an environmental protection department is solved, the method has great significance in monitoring and supervision of fugitive emission of the pickles plant, and scientific theory is proposed for off-flavor detection of waste gas to a certain extent.

Description

technical field [0001] The invention relates to a method for detecting unorganized odorous substances emitted from pickle factories. Specifically, solid-phase microextraction technology is used to extract unorganized odorous substances emitted from pickle factories, and the samples to be tested are detected by the odor analysis system GC-MS / MS. The reaction monitoring technology (MRM) is selected for detection, and the odor-causing components can be accurately judged through the sensory information of the odor components in the odor analysis database. Background technique [0002] Volatile organic compounds (Volatile organic compounds, VOCs) are an important class of gaseous pollutants, which usually refer to organic compounds with a boiling point of 50-260°C at normal pressure and a saturated vapor pressure exceeding 133.32Pa at room temperature. As important gaseous pollutants, VOCs have a significant impact on the atmospheric environment and human health. Relevant resear...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 高占啟胡冠九王荟朱冰清陈素兰
Owner JIANGSU ENVIRONMENTAL MONITORING CENT
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