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
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[0018] [Example 1]
[0019] Determination of characteristic pollutants in the groundwater of a gas station.
[0020] 1 Instruments and accessories
[0021] (1) Agilent 7890A / 5975C gas-mass spectrometer (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 bottle with PTFE sealing silicone rubber gasket.
[0024] 2Materials and reagents
[0025] (1) High-purity helium: purity ≥99.9995%.
[0026] (2) Methyl tert-butyl ether, benzene, toluene, p-xylene, meta-xylene, o-xylene, ethylbenzene, naphthalene, all chromatographically pure; methanol, pure liquid chromatographic, no interference by inspection; naphthalene / The methanol standard solution is 20.1mg / L chromatographic standard solution; the test water is commercially available purified water, which has passed the blank test without interference. Hydrochloric acid, pure superior grade.
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