Method for determining volatile organic compounds in stationary pollution source

A technology of volatile organic compounds and fixed pollution sources, which is used in measuring devices, instruments, scientific instruments, etc., to achieve the effects of improving analysis efficiency, stable and accurate data, and fast and convenient methods.

Inactive Publication Date: 2020-04-14
JIANGSU TAIJIE INSPECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to: in order to solve the problem that the determination method of the volatile organic compound in the exhaust gas of the existing fixed pollution source has defects, and propose a kind of determination method of the volatile organic compound in the fixed pollution source

Method used

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  • Method for determining volatile organic compounds in stationary pollution source
  • Method for determining volatile organic compounds in stationary pollution source
  • Method for determining volatile organic compounds in stationary pollution source

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Experimental program
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Embodiment

[0041] 1. Instruments and reagents

[0042] (1) Instrument

[0043] Gas chromatograph: QCMS-QP2010SE, equipped with hydrogen flame ion detector;

[0044] Chromatographic column: DB-FFAP: 30m*0.32mm*1.00μm; VF-624MS: 60m*0.32mm*1.80μm;

[0045] Thermal desorption: TD-30.

[0046] Assembly of the instrument: a general gas chromatography-mass spectrometer will be equipped with a sample inlet (containing a liquid autosampler and a hundred-bit sample tray, denoted by I1) and a mass spectrometer (MS detector, denoted by D1) , and on this basis, another sample inlet (installed with a thermal desorption device, represented by I2) and a universal detector (FID detector, represented by D2) are installed. This configuration can reduce the efficiency caused by frequent switching on and off of the instrument. Lower problem.

[0047] (2) Reagents

[0048] Methanol: HPLC grade / 4L.

[0049] Carbon disulfide: low benzene grade, ≥99.9%.

[0050] Standards: 22 kinds of VOC mixed standard,...

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Abstract

The invention discloses a method for determining volatile organic compounds in stationary pollution source waste gas. According to the method, a thermal desorption sample inlet and a universal detector (FID detector) are mounted on an existing gas chromatograph-mass spectrometer; high-concentration and conventional-concentration volatile organic compounds can be accurately analyzed on the premiseof saving the investment of instruments and equipment and improving the working efficiency; the high-concentration volatile organic compounds adopt carbon disulfide as a solvent, and liquid sample injection, DB-FFAP (30m * 0.32 mm * 1.00 [mu] m) capillary column separation and FID detector analysis are carried out, and 24 volatile organic compounds including m-xylene and p-xylene can be completelyseparated; methanol is used as a solvent for conventional volatile organic compounds, thermal desorption sample introduction, VF-624MS (60m * 0.32 mm * 1.80 mu m) capillary column separation and massspectrometry are carried out, and the content of the conventional volatile organic compounds can be accurately analyzed. The relative standard deviation of the volatile organic compounds with the conventional concentration is 3%-7%, and the relative standard deviation of the volatile organic compounds with the high concentration is 2%-5%.

Description

technical field [0001] The invention relates to the technical field of volatile organic compounds, in particular to a method for measuring volatile organic compounds in fixed pollution sources. Background technique [0002] According to the definition of the World Health Organization, volatile organic compounds (VOCs) are various organic compounds with a boiling point of 50°C to 260°C at room temperature. Organic compounds below ℃, or all organic compounds with a vapor pressure greater than or equal to 10Pa and volatile at 20°C, fixed pollution usually refers to air pollution sources, and atmospheric fixed pollution sources refer to fixed emission sources of air pollutants, Including pots and kilns of factories, enterprises and institutions, and catering service units, as well as exhaust pipes used by residents for daily life. [0003] Volatile organic compounds (VOCs) are important precursors for the formation of secondary pollutants such as fine particulate matter (PM2.5)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/34G01N30/86
CPCG01N30/02G01N30/8679G01N30/34G01N2030/025
Inventor 林新艳周树华丁燕俞晓明
Owner JIANGSU TAIJIE INSPECTION TECH
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