Method for detecting 123 polycyclic aromatic hydrocarbons in environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry

A triple quadrupole, mass spectrometry detection technology, applied in the field of detection of 123 kinds of polycyclic aromatic hydrocarbons in environmental media, can solve the problems of long detection and analysis time, few types of detection, error in detection results, etc.

Active Publication Date: 2020-11-24
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems that the current detection method for PAHs can detect few types, long detection and analysis time, high detection limit, and large error in detection results due t...

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  • Method for detecting 123 polycyclic aromatic hydrocarbons in environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry
  • Method for detecting 123 polycyclic aromatic hydrocarbons in environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry
  • Method for detecting 123 polycyclic aromatic hydrocarbons in environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry

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specific Embodiment approach 1

[0043] Specific embodiment 1: A method for detecting 123 kinds of polycyclic aromatic hydrocarbons in an environmental medium by gas chromatography in series triple quadrupole mass spectrometry in this embodiment is carried out according to the following steps:

[0044] 1. Classification: According to the group and control requirements of PAHs, 123 kinds of PAHs are divided into 3 categories, the first category is 32 kinds of conventional (including 16 kinds of optimal control) polycyclic aromatic hydrocarbons (R-PAHs), the second category is 50 kinds Methyl polycyclic aromatic hydrocarbons (Me-PAHs), the third category is 30 kinds of nitro polycyclic aromatic hydrocarbons (N-PAHs) and 11 kinds of hydroxy polycyclic aromatic hydrocarbons (OH-PAHs), classified for follow-up detection;

[0045] 2. Optimize mass spectrometry parameters by single-standard injection: ①According to the classification in step 1, take 32 kinds of R-PAHs standard products (10ppm), use full-scan (SCAN) m...

specific Embodiment approach 2

[0066] Specific embodiment two: the difference between this embodiment and specific embodiment one is that step two, step three and step four are different from specific embodiment one, specifically as follows: two, single-standard sampling optimization mass spectrometry parameters: 1. according to step one Classify, take 50 kinds of Me-PAHs standard substance (10ppm), adopt full scanning (SCAN) mode single-standard injection, through gas chromatography series triple quadrupole mass spectrometry (Agilent7890A-7000B type GC-EI-MS / MS) 50 kinds of Me-PAHs (10ppm) were detected with a single standard, and the mass-to-charge ratio scanning range was 50 to 400. The retention time and characteristic precursor ions of each standard were initially determined, and the three most abundant ions were selected from the characteristic precursor ions. Fragments, use the product ion scanning mode to crush the fragments, determine the characteristic product ions, and obtain the retention time, c...

specific Embodiment approach 3

[0086] Specific embodiment three: the difference between this embodiment and specific embodiment one is: step 2, step 3, step 4 and step 6 are different from specific embodiment 1, specifically as follows: 2. Single-standard sample injection optimization mass spectrometry parameters: ① press The classification of step 1, get 30 kinds of NPAHs and 11 kinds of OH-PAHs standard substance (10ppm), adopt full scan (SCAN) mode single-standard sampling, through gas chromatography series triple quadrupole mass spectrometer (Agilent7890A-7000B type GC-EI -MS / MS) for single standard detection of 30 kinds of N-PAHs and 11 kinds of OH-PAHs (10ppm). Select three ion fragments with the highest abundance from the characteristic precursor ions, and use the product ion scanning mode to fragment the fragments to determine the characteristic product ions, thereby obtaining the retention time, characteristic precursor ions, and characteristic product ions of each standard; ②In During mass spectro...

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Abstract

The invention relates to a method for detecting 123 polycyclic aromatic hydrocarbons in an environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry. The invention belongs to the technical field of pollutant detection. The invention aims to solve the technical problems of few types of detectable PAHs detection methods, long detection and analysis time, high detection limit and large detection result error caused by incapability of realizing isomeride separation in the detection process in the prior art. The method comprises the steps: 1, dividing 123 PAHs intothree types according to groups and control requirements; 2, single-standard sample introduction: setting mass spectrum parameters according to the determined gain voltage, qualitative ion pair and quantitative ion pair of a target object and the corresponding collision energy; 3, determining gas phase parameters through mixed standard sample introduction; 4, making a standard curve; 5, extracting and purifying PAHs in an actual sample to obtain a sample to be analyzed; and 6, detecting an actual sample. According to the method, the sensitivity of separation and qualitative and quantitative detection of the isomeride is high, the repeatability is good, and the analysis time is shortened to 35 min-40 min.

Description

technical field [0001] The invention belongs to the technical field of pollutant detection; in particular, it relates to a method for detecting 123 kinds of polycyclic aromatic hydrocarbons in an environmental medium by using gas chromatography in series with a triple quadrupole mass spectrometer. Background technique [0002] Since the beginning of the 20th century, with the improvement of human living standards, a large amount of toxic organic pollutants have been discharged into the environment indiscriminately, and the environment in which human beings live has been seriously polluted and destroyed. Persistent toxic substances are a kind of special toxic organic pollutants with environmental persistence, bioaccumulation and high biotoxicity. They can exist in the environment for a long time and are difficult to degrade. Teratogenicity, mutagenicity), has attracted global attention, and has become the third largest environmental problem after the destruction of the ozone ...

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Application Information

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IPC IPC(8): G01N30/88G01N30/30
CPCG01N30/30G01N30/88G01N2030/8854
Inventor 张子峰王璐滕雨芊朱宁正蔡明红赵亚娴李一凡
Owner HARBIN INST OF TECH
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