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Method for determining pollutants in groundwater of gas station

A measurement method and groundwater technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of high detection limit of pollutants, and achieve the effects of high sensitivity, strong anti-interference, and good technical effect

Inactive Publication Date: 2019-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem that the detection limit of pollutants is relatively high in the prior art, and a new method for measuring pollutants in groundwater of gas stations is provided, which has the advantages of low detection limit of pollutants and high sensitivity

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  • Method for determining pollutants in groundwater of gas station
  • Method for determining pollutants in groundwater of gas station

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Embodiment 1

[0019] Determination of characteristic pollutants in groundwater of a gas station.

[0020] 1 Instruments and Accessories

[0021] (1) Agilent 7890A / 5975C GC / MS (EI source); Tekmar ATOMX solid / liquid automatic purge and trap concentrator.

[0022] (2) Chromatographic column: HP-5MS type capillary chromatographic column (30m×0.25mm×0.25μm).

[0023] (3) 40mL sample vial with PTFE sealing silicone rubber gasket.

[0024] 2 Materials and Reagents

[0025] (1) High-purity helium: purity ≥ 99.9995%.

[0026] (2) MTBE, benzene, toluene, p-xylene, m-xylene, o-xylene, ethylbenzene, and naphthalene are all chromatographically pure; methanol is liquid chromatographically pure and has no interference through inspection; naphthalene / Methanol standard solution is 20.1 mg / L chromatographic standard solution; test water is commercially available purified water, which passes the blank test without interference. Hydrochloric acid, superior grade.

[0027] (3) Internal standard: fluorobe...

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Abstract

The invention relates to a method for determining pollutants in groundwater of a gas station. The problem of high detection limit of the pollutants in the prior art is mainly solved. The method for determining the pollutants in the groundwater of the gas station includes the steps that groundwater samples of the gas station are collected, an internal standard and a substitute solution are added after the groundwater samples are pretreated, then the product is purged and concentrated through a solid-liquid full-automatic purge trap concentrator to enter a gas chromatography, then enter a mass spectrum after chromatographic separation, the quantitative ion flow peak area is obtained by selecting ion scanning, according to the technical scheme, the corresponding ratio of the ion flow peak area of target compound quantitative ions to the peak area of an internal standard quantitative ion flow is taken as an ordinate, the concentration ratio is taken as an abscissa to establish the standardcurve, the problems are well solved, and the method can be used for determination of the pollutants in the groundwater of the gas station.

Description

technical field [0001] The invention relates to a method for measuring pollutants in underground water of gas stations. Background technique [0002] The leakage of buried oil tanks in gas stations has become a serious problem in the field of environmental pollution prevention and control in the world. Our country has just started the research on the field of groundwater pollution caused by leakage of underground storage tank systems in gas stations, and there is no management standard and detection technology for groundwater pollution in gas stations in China. The characteristic pollutants in the groundwater of gas stations mainly come from methyl tert-butyl ether, benzene series and polycyclic aromatic hydrocarbons in oil products. The establishment of pollutant monitoring technology research is of great significance for the future investigation of groundwater pollution in gas stations, mastering the quality status of groundwater in gas stations, and evaluating its risk o...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/72G01N30/06G01N30/08
CPCG01N30/02G01N30/06G01N30/08G01N30/72
Inventor 肖寒马明孙晓英高翔李明哲魏新明邹兵肖安山
Owner CHINA PETROLEUM & CHEM CORP