固定污染源廢氣的采樣應符合中的相關(guān)規(guī)定。采樣時敲開活性炭采樣管的兩端，與煙氣采樣器相連（A段為氣體入口），檢查采樣系統(tǒng)的氣密性，檢查方法和標準按照HJ/T 397要求執(zhí)行。以0.2 L/min～1.0 L/min的采樣流量，連續(xù)采樣1 h，或在1 h內(nèi)以等時間間隔采集3～4個樣品計平均值，采樣時間一般不少于10 min。若廢氣中濕度太大，以致在活性炭管中凝結(jié)時，必須在煙氣采樣槍和活性炭采樣管之間加裝除濕裝置，并伴熱以除去水汽對活性炭采樣管的影響。
本標準規(guī)定了環(huán)境空氣和廢氣中三甲苯（1,3,5-三甲苯、1,2,4-三甲苯和1,2,3-三甲苯）測定的活性炭吸附/二硫化碳解吸-氣相色譜法。
本標準適用于環(huán)境空氣以及木質(zhì)家具制造業(yè)、汽車制造和維修業(yè)等有組織和無組織排放廢氣中三甲苯的測定，其他行業(yè)廢氣經(jīng)驗證后也可使用本方法。
對于環(huán)境空氣，當采樣體積為30 L時，本方法檢出限為0.004 mg/m3～0.006 mg/m3，測定下限為0.016 mg/m3～0.024 mg/m3；對于廢氣，當采樣體積為10 L時，本方法檢出限均為0.02 mg/m3，測定下限均為0.08 mg/m3，詳見附錄A。
名稱：聚乙二醇毛細管柱
型號：PEG-20M
規(guī)格：30m*0.32mm*1.0um
溫度：240°C
The sampling of exhaust gas from fixed pollution sources should comply with the relevant regulations in. When sampling, open both ends of the activated carbon sampling tube and connect it to the flue gas sampler (section A is the gas inlet) to check the airtightness of the sampling system. The inspection method and standard should be carried out in accordance with the requirements of HJ/T 397. Sample continuously for 1 hour at a sampling flow rate of 0.2 L/min to 1.0 L/min, or collect 3-4 samples at equal time intervals within 1 hour to calculate the average value. The sampling time is generally not less than 10 minutes. If the humidity in the exhaust gas is too high to condense in the activated carbon tube, a dehumidification device must be installed between the flue gas sampling gun and the activated carbon sampling tube, and heat tracing must be carried out to remove the influence of water vapor on the activated carbon sampling tube.
This standard specifies the activated carbon adsorption/Carbon disulfide desorption gas chromatography method for the determination of trimethylene (1,3,5-trimethylene, 1,2,4-trimethylene and 1,2,3-trimethylene) in ambient air and waste gas.
This standard is applicable to the determination of trimethylbenzene in environmental air, as well as in organized and unorganized exhaust gases from wood furniture manufacturing, automotive manufacturing, and maintenance industries. This method can also be used after verification in other industries' exhaust gases.
For ambient air, when the sampling volume is 30 L, the detection limit of this method is 0.004 mg/m3 to 0.006 mg/m3, and the detection limit is 0.016 mg/m3 to 0.024 mg/m3; For exhaust gas, when the sampling volume is 10 L, the detection limit of this method is 0.02 mg/m3, and the lower limit of determination is 0.08 mg/m3. Please refer to Appendix A.
Name: Polyethylene glycol capillary column
Model: PEG-20M
Specification: 30m * 0.32mm * 1.0um
Temperature: 240 ° C
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