Method for detecting halogenated hydrocarbon in air
A detection method and technology for halogenated hydrocarbons, which are applied in measurement devices, instruments, scientific instruments, etc., can solve the problem of inability to meet the requirements of simultaneous and accurate detection, and achieve the effects of simple operation, symmetrical peak shape, and rapid analysis.
Pending Publication Date: 2021-07-02
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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Problems solved by technology
Therefore, a single detector cannot meet the demand for simultaneous and accurate detection of two types of controlled halogenated hydrocarbons, ODS and GHG.
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Embodiment 1
[0021] A method for detecting halogenated hydrocarbons in air, comprising the following steps:
[0022] S1. Inject samples containing 17 kinds of controlled trace halogenated hydrocarbons such as CFCs, HCFCs, HFCs, chlorinated hydrocarbons and brominated hydrocarbons into the concentration system for concentration;
[0023] S2. The sample through step S1 enters the gas chromatograph for separation;
[0024] S3.S3. Use a split plate to divide the sample passed through step S2 into two, one part enters the mass spectrometer detector and the other part enters the electron capture detector;
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The invention relates to the technical field of environment detection, in particular to a method for detecting halogenated hydrocarbon in air, which comprises the following steps: S1, feeding a sample to be detected into a concentration system for concentration; S2, enabling the sample obtained in the step S1 to enter gas chromatography for separation; S3, dividing the sample obtained in the step S2 into two parts by using a shunting flat plate, wherein one part enters a mass spectrum detector and the other part enters an electron capture detector; S4, repeating the steps S1-S3 by adopting a standard concentration solution, and drawing a standard curve; and carrying out quantitative determination according to a standard curve. The effect that 17 controlled trace halogenated hydrocarbon samples with different electronegativity are efficiently measured at the same time through two detectors after one-time sample introduction is achieved, and the method has the advantages of being rapid in analysis, small in needed sample amount, good in separation effect, symmetric in peak pattern, high in detection sensitivity and easy and convenient to operate.
Description
technical field [0001] The invention relates to the technical field of environmental detection, in particular to a method for detecting halogenated hydrocarbons in the air. Background technique [0002] Hydrochlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), chlorinated hydrocarbons, brominated hydrocarbons, and hydrofluorocarbons (HFCs) as greenhouse gases have long received widespread attention as ozone-depleting substances, and have also become "Montreal Protocol" and "Montreal Protocol". Controlled substances under the Kyoto Protocol. However, it is a challenging task to accurately determine a variety of controlled trace halogenated hydrocarbons at the same time. The atmospheric trace halogenated hydrocarbons detection method used by research institutions and observation stations at home and abroad is mainly gas chromatography-mass spectrometry detector (GC-MSD) Or gas chromatography-electron capture detector (GC-ECD). As a broad-spectrum detector, although ...
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Login to View More IPC IPC(8): G01N30/02G01N30/72G01N30/70
CPCG01N30/02G01N30/72G01N30/70
Inventor 黄忠辉聂鹏贺辉谢丹平黄钟坤刘旺
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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