為改善直接進樣法中高濃度鹽對進樣口、色譜柱和檢測器的污染,降低檢出限。浩瀚色譜建立了頂空氣相色譜法測定空氣和廢氣中乙醛的方法,并對色譜條件和頂空進樣條件進行了優(yōu)化。結(jié)果:該方法的檢出限1.0μg,當采樣體積為100 L時,方法檢出濃度為0.01 mg/m3,室內(nèi)相對標準偏差為1.6%~5.0%,加標回收率為95.2%~101.0%。結(jié)論:該方法有效地避免了直接進樣法中高濃度鹽對進樣口、色譜柱乃至檢測器的污染,并且大大降低了檢出限,方法的可靠性和可操作性令人滿意。
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本標準適用于固定污染源有組織排放和無組織排放的乙醛測定。當采樣條件為100L，進樣條件為1μl時，乙醛的檢出限為4×10-2mg/m3，乙醛的定量測定濃度范圍為0.14mg/m3～30mg/m3。
名稱：不銹鋼填充柱
規(guī)格：2m*3mm
型號：20%PEG-20M/GCS880 AW DMCS
編號：20240812006
*高溫度：240°C
應(yīng)用：HJ/T 35-1999?固定污染源排氣中乙醛的測定 氣相色譜法
適用于安捷倫，島津，賽默飛，瓦里安，布魯克，PE，磐諾，天瑞，天美，北分瑞利，東西電子，福立
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To improve the contamination of the injection port, chromatographic column, and detector by high concentration salts in direct injection method and reduce the detection limit. Haohan Chromatography has established a headspace gas chromatography method for the determination of acetaldehyde in air and exhaust gas, and optimized the chromatographic and headspace injection conditions. Result: The detection limit of this method is 1.0 μ g. When the sampling volume is 100 L, the detected concentration of the method is 0.01 mg/m3, the indoor relative standard deviation is 1.6%~5.0%, and the spiked recovery rate is 95.2%~101.0%. Conclusion: This method effectively avoids contamination of the injection port, chromatographic column, and even detector by high concentration salts in direct injection method, and greatly reduces the detection limit. The reliability and operability of the method are satisfactory.
This standard is applicable to the determination of acetaldehyde in organized and unorganized emissions from fixed pollution sources. When the sampling condition is 100L and the injection condition is 1 μ l, the detection limit of acetaldehyde is 4 × 10-2mg/m3, and the quantitative determination concentration range of acetaldehyde is 0.14mg/m3 to 30mg/m3.
Name: Stainless Steel Filled Column
Specification: 2m * 3mm
Model: 20% PEG-20M/GCS880 AW DMCS
Number: 20240812006
*High temperature: 240 ° C
Application: HJ/T 35-1999 Determination of Acetaldehyde in Fixed Source Exhaust Gas Gas Chromatography Method
Suitable for Agilent, Shimadzu, Thermo Fisher, Varian, Brooke, PE, Panno, Tianrui, Tianmei, Beifen Ruili, Dongxi Electronics, Fuli
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