Method for simultaneous detection of non-chlorinated-low-chlorinated-high-chlorinated dioxins in environmental samples
A technology for detecting high-chlorinated dioxins and the environment, which is applied in the field of high-resolution gas chromatography-high-resolution mass spectrometry, can solve the problems of incomplete and non-included types of low-chlorinated dioxins, poor selectivity and sensitivity, etc. Achieve the effect of reducing false positive results, reducing interference, and strict quality assurance
Active Publication Date: 2022-03-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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[0004] Isotope dilution high-resolution gas chromatography-high-resolution mass spectrometry (ID-HRGC-HRMS) has extremely high selectivity and sensitivity. The analysis of PCDD / Fs in environmental samples mainly refers to the US EPA 1613 method and the Chinese standard method (HJ 77 -2008), but these method analyzes do not include the analysis of PCDD / Fs substituted with 0-3 chlorine atoms, and in the existing literature on PCDD / Fs substituted with 0-3 chlorine atoms, there are analysis The types of low-chlorinated dioxins are not comprehensive (for example, the analysis of non-chlorinated dioxins is not included), low-resolution mass spectrometry with poor selectivity and sensitivity is used, and high-chlorinated and low-chlorinated dioxins are treated separately. There are problems and shortcomings such as cost analysis and the analysis and quantification of low-chlorinated dioxins by external standard method. Therefore, there is no systematic and perfect analysis method for the analysis of per-chlorinated dioxins.
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Embodiment 1
[0070] Firstly, the relative response factor (RRF) and the response factor (RF) are calculated according to the steps of the quantitative method through the determination of a series of mixed standard solutions.
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The invention provides an isotope dilution high-resolution gas chromatography-high-resolution mass spectrometry method for one-shot sampling and accurate detection of non-chlorinated-low-chlorinated-high-chlorinated dioxins in environmental samples at the same time. Specifically, high-resolution gas chromatography is used to effectively separate non-chlorinated-low-chlorinated-high-chlorinated dioxins, and then detected by high-resolution mass spectrometry. ‑Methods for accurate qualitative and quantitative analysis of highly chlorinated dioxins. This method expands the scope of detection of dioxin congeners, and pushes the detection method of four-octachloro substituted dioxins / furans to the detection of all dioxins / furans. This method has high analysis and detection efficiency and simple instrument operation. The qualitative and quantitative methods are accurate and reliable, and the test results are highly reliable, which is of great significance for the research and monitoring of dioxin-like persistent organic pollutants in the environment.
Description
technical field [0001] The invention relates to a method for simultaneously detecting non-chlorinated-low-chlorinated-high-chlorinated dioxins in environmental samples by injecting samples with one needle, and belongs to the field of environmental analysis. Specifically, it is a high-resolution gas chromatography-high-resolution mass spectrometry method for accurate qualitative and quantitative analysis of non-chlorinated-low-chlorinated-high-chlorinated dioxins using the isotope dilution internal standard method. Background technique [0002] Dioxin (PCDD / Fs) is a general term for Polychlorinated dibenzo-p-dioxins (PCDDs) and Polychlorinated dibenzofurans (PCDFs). The physical and chemical properties of PCDD / Fs with different chlorine substitutions are slightly different. With the increase of chlorination degree, the solubility and volatility decrease accordingly. [0003] PCDD / Fs is a class of highly toxic persistent organic pollutants. The analysis and research of PCDD / F...
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IPC IPC(8): G01N30/02
Inventor 夏科学倪余文张亦弛曹蓉张海军陈吉平
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI