浩瀚HH-WAX固定污染源废气 苯系物的测定 气袋采样 直接进样毛细管柱

固定污染源废气 苯系物的测定 气袋采样 直接进样-气相色谱法（征求意见稿）
1 适用范围

      本标准规定了测定固定污染源废气中苯系物的气袋采样/直接进样-气相色谱法。

本标准适用于固定污染源废气中的苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯和苯乙烯的测定。

当进样体积为 1.0ml时,苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯和苯乙烯方法检出限为 0.2~0.6mg/m3,测定下限为 0.4~2.4mg/m3,详见附录 A。

2 规范性引用文件

本标准引用了下列文件或其中的条款。凡是不注日期的引用文件,其有效版本适用于本标准。

      GB/T 16157 固定污染源排气中颗粒物测定与气态污染物采样方法

      HJ 732 固定污染源废气 挥发性有机物的采样

      HJ/T 397 气袋法固定源废气监测技术规范

3 方法原理

用气袋采集固定污染源废气中苯系物,取一定体积的样品直接注入带有氢火焰化检测器 (FID)的气相色谱仪中直接测定分析。根据保留时间定性,峰面积定量。

4 干扰和消除

      样品成分复杂时会对测定产生干扰,可以使用 GC/MS 定性确认。

5 试剂和材料

    除非另有说明,分析时均使用符合国家标准的分析纯试剂。

5.1 标准气体:含有苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯、苯乙烯待测化合物的有证标准气体,且保证钢瓶压力输出为10MPa。

5.2 标准物质:苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯、异丙苯、苯乙烯,色谱纯。

5.3 氮气:纯度≥99.99%。

5.4 氢气:纯度≥99.99%。

5.5 空气:用净化管净化。
Exhaust gas from stationary pollution sources, Determination of benzene series, air bag sampling, direct injection-gas chromatography (draft for comments)
1 Scope of application

      This standard specifies the air bag sampling/direct sampling-gas chromatography method for the determination of benzene series in waste gas from stationary pollution sources.

This standard applies to the determination of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and styrene in waste gas from stationary pollution sources.

When the injection volume is 1.0ml, the detection limit of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and styrene is 0.2~0.6mg/m3, and the lower limit of determination is 0.4 ~2.4mg/m3, see Appendix A for details.

2 Normative references

This standard refers to the following documents or clauses thereof. For undated references, the valid version applies to this standard.

      GB/T 16157 Determination of particulate matter in exhaust gas from stationary pollution sources and sampling methods for gaseous pollutants

      HJ 732 Waste gas from stationary pollution sources - Sampling of volatile organic compounds

      HJ/T 397 Technical Specification for Airbag Method Stationary Source Waste Gas Monitoring

3 Principles of the method

The benzene series compounds in the waste gas of fixed pollution sources were collected by air bags, and a certain volume of samples were taken and injected directly into a gas chromatograph equipped with a hydrogen flame detector (FID) for direct determination and analysis. Qualitative by retention time, quantitative peak area.

4 Interference and cancellation

      When the sample composition is complex, it will interfere with the determination and can be qualitatively confirmed by GC/MS.

5 Reagents and Materials

    Unless otherwise specified, analytical reagents that meet national standards were used in the analysis.

5.1 Standard gas: certified standard gas containing benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene, styrene to be tested, and the cylinder pressure output is guaranteed to be 10MPa.

5.2 Standard substances: benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene, styrene, chromatographically pure.

5.3 Nitrogen: purity ≥99.99%.

5.4 Hydrogen: purity ≥99.99%.

5.5 Air: Purify with a purification tube.