超声波抽提气溶胶样品，用GC - MS的选择离子监测(SIM)方式测定EPA提出的优先监测的16种多环芳烃的含量。
The aerosol sample was extracted by ultrasonic technique and 16 of the PAH's were determined, in priority, as proposed by EPA, by GC-MS with selected-ion monitoring (SIM).
带自动进样器的气相色谱-质谱联用仪（GC-MS），分流/不分流进样，可编程的柱箱和可以进行离子选择监测。
Gas Chromatograph-Mass Spectrometer (GC-MS) with an auto-sampler, split/splitless inlet, programmable GC oven, and capable of selective ion monitoring.
在桂林国家森林公园选择不同的植被群落类型进行空气离子浓度监测，研究森林游憩区空气负离子浓度水平变化。
To study the variation of aero-anion concentration in forest recreational areas, the concentrations of aero-ion were measured under different vegetation types in Guilin National forest Park.
选择了具有代表性的有一定塌陷时间的谢桥矿塌陷水域，监测分析其水质理化指标、常规离子和重金属元素。
This paper mainly analyzed the physicochemical indexes and got the situation of huai′nan subsidence water by inspecting during form period.
选择了具有代表性的有一定塌陷时间的谢桥矿塌陷水域，监测分析其水质理化指标、常规离子和重金属元素。
This paper mainly analyzed the physicochemical indexes and got the situation of huai′nan subsidence water by inspecting during form period.
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