5%Carbowax20M Carbopack B填充柱 固定污染源排气中甲醇的检测

固定液：5%Carbowax20M （聚乙二醇）

载体：Carbopack B（石墨化碳黑）

规格：2m*3mm

粒度：80-120目
材质：不锈钢（玻璃）
应用：HJ/T 33-1999 固定污染源排气中甲醇的测定 气相色谱法

1 适用范围

1.1 本标准适用于固定污染源有组织排放和无组织排放的甲醇测定。

1.2 以3倍噪音色谱峰高值计算，当色谱进样量为1.0 ml时，方法的检出限为2 mg/m³；定量测定的浓度范围为5.0-10⁴ mg/m³。

2 方法原理
载气携带含有甲醇(CH₃OH）的试样通过装有固定相的色谱柱，流出色谱柱的甲醇由氢火焰离子化检测器(FID)测定。以标准样品色谱峰的保留时间进行定性，以峰高（或峰面积）定量。

3 引用标准

下列标准所包含的条文，通过在本标准中引用而构成为本标准的条文。

GB 16297-1996 大气污染物综合排放标准

GB 16157-1996 固定污染源排气中颗粒物测定和气态污染物采样方法

4 试剂和材料

4.1 色谱固定液：5%聚乙二醇(Carbowax 20M)。

4.2 载体：石墨碳黑(Carbopack B) 80~120目。

4.3 载气：体积分数为高纯氮99.99％。

4.4 燃烧气：体积分数为纯氢99.9%。

4.5 助燃气：空气。

4.6 无碱玻璃棉。

4.7 甲醇标准气。

甲醇标准气的稀释方法：根据需要用100 ml全玻璃注射器进行稀释配气（参考《空气和废气监测分析方法》(1990) P42)。

5 仪器

5.1 气相色谱仪

5.1.1 检测器：氢火焰离子化检测器。

5.1.2 色谱柱

5.1.2.1 色谱柱类型：2m×2~3mm的玻璃（或不锈钢）填充柱

5.1.2.2 色谱柱填充物：5%Carbowax 20M Carbopack B 80-120目。

色谱柱的填充方法见附录B。

固定污染源排气中甲醇的检测 测试谱图：


Determination of Methanol in Exhaust from Stationary Pollution Sources
Determination of Methanol in Exhaust from Stationary Pollution Sources Details:

Name: Packed column
Fixative: 5% Carbowax20M (polyethylene glycol)

Carrier: Carbopack B (graphitized carbon black)

Specification: 2m*3mm

Granularity: 80-120 mesh
Material: stainless steel (glass)
Application: HJ/T 33-1999 Determination of Methanol in Exhaust Gas from Stationary Pollution Sources Gas Chromatography

1 Scope of application

1.1 This standard applies to the determination of methanol from fixed pollution sources with organized and unorganized emissions.

1.2 Calculated by 3 times the noise chromatographic peak height value, when the chromatographic injection volume is 1.0 ml, the detection limit of the method is 2 mg/m3; the concentration range for quantitative determination is 5.0-104 mg/m3.

2 Principles of the method
The carrier gas carries a sample containing methanol (CH3OH) through a chromatographic column equipped with a stationary phase, and the methanol flowing out of the chromatographic column is measured by a hydrogen flame ionization detector (FID). Qualitatively based on the retention time of the chromatographic peak of the standard sample, and quantitatively based on the peak height (or peak area).

3 Reference standards

The provisions contained in the following standards constitute the provisions of this standard through quotation in this standard.

GB 16297-1996 Comprehensive Emission Standard of Air Pollutants

GB 16157-1996 Determination of particulate matter in exhaust gas from stationary sources and sampling method for gaseous pollutants

4 Reagents and materials

4.1 Chromatographic stationary liquid: 5% polyethylene glycol (Carbowax 20M).

4.2 Carrier: Graphite carbon black (Carbopack B) 80~120 mesh.

4.3 Carrier gas: the volume fraction is 99.99% of high purity nitrogen.

4.4 Combustion gas: the volume fraction of pure hydrogen is 99.9%.

4.5 Combustion gas: air.

4.6 Alkali-free glass wool.

4.7 Methanol standard gas.

The dilution method of methanol standard gas: as needed, use a 100 ml all-glass syringe to dilute the gas (refer to "Air and Waste Gas Monitoring and Analysis Methods" (1990) P42).

5 Instruments

5.1 Gas chromatograph

5.1.1 Detector: hydrogen flame ionization detector.

5.1.2 Column

5.1.2.1 Chromatographic column type: 2m×2~3mm glass (or stainless steel) packed column

5.1.2.2 Column packing: 5% Carbowax 20M Carbopack B 80-120 mesh.

See Appendix B for the packing method of the chromatographic column.


Determination of methanol in exhaust gas from stationary pollution sources Test spectrum: