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固定污染源排氣中甲醇的檢測
固定污染源排氣中甲醇的檢測 詳細信息：

名稱：填充柱

固定液：5%Carbowax20M （聚乙二醇）

載體：Carbopack B（石墨化碳黑）

規格：2m*3mm

粒度：80-120目
材質：不銹鋼（玻璃）
應用：HJ/T 33-1999 固定污染源排氣中甲醇的測定 氣相色譜法

1 適用范圍

1.1 本標準適用于固定污染源有組織排放和無組織排放的甲醇測定。

1.2 以3倍噪音色譜峰高值計算，當色譜進樣量為1.0 ml時，方法的檢出限為2 mg/m³；定量測定的濃度范圍為5.0-10⁴ mg/m³。

2 方法原理
載氣攜帶含有甲醇(CH₃OH）的試樣通過裝有固定相的色譜柱，流出色譜柱的甲醇由氫火焰離子化檢測器(FID)測定。以標準樣品色譜峰的保留時間進行定性，以峰高（或峰面積）定量。

3 引用標準

下列標準所包含的條文，通過在本標準中引用而構成為本標準的條文。

GB 16297-1996 大氣污染物綜合排放標準

GB 16157-1996 固定污染源排氣中顆粒物測定和氣態污染物采樣方法

4 試劑和材料

4.1 色譜固定液：5%聚乙二醇(Carbowax 20M)。

4.2 載體：石墨碳黑(Carbopack B) 80~120目。

4.3 載氣：體積分數為高純氮99.99％。

4.4 燃燒氣：體積分數為純氫99.9%。

4.5 助燃氣：空氣。

4.6 無堿玻璃棉。

4.7 甲醇標準氣。

甲醇標準氣的稀釋方法：根據需要用100 ml全玻璃注射器進行稀釋配氣（參考《空氣和廢氣監測分析方法》(1990) P42)。

5 儀器

5.1 氣相色譜儀

5.1.1 檢測器：氫火焰離子化檢測器。

5.1.2 色譜柱

5.1.2.1 色譜柱類型：2m×2~3mm的玻璃（或不銹鋼）填充柱

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

色譜柱的填充方法見附錄B。

固定污染源排氣中甲醇的檢測 測試譜圖：


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:

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