标准溶液 固定污染源废气苯系物测定

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。

固定污染源废气苯系物测定 图片：



Determination of benzene series in stationary pollution source waste gas
Determination of benzene series in waste gas from stationary pollution source Details:

Fixed pollution source waste gas 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 injection-gas chromatography method for the determination of benzene series in waste gas from stationary sources.

This standard is applicable to the determination of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene, cumene and styrene in waste gas from stationary 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 quotes the following documents or their clauses. For undated reference documents, their valid versions apply to this standard.

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

HJ 732 Sampling of volatile organic compounds from stationary pollution sources

HJ/T 397 Airbag method fixed source exhaust gas monitoring technical specifications

3 Principles of the method

Use an air bag to collect the benzene series in the exhaust gas of a fixed pollution source, and take a certain volume of sample directly into a gas chromatograph with a hydrogen flame detector (FID) for direct measurement and analysis. Qualitative based on retention time and quantitative peak area.

4 Interference and elimination

Complicated sample composition will interfere with the determination, which can be qualitatively confirmed by GC/MS.

5 Reagents and materials

Unless otherwise specified, analytical reagents that meet national standards are used for analysis.

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

5.2 Standard materials: 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.

Determination of benzene series in waste gas from stationary sources