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（山東）應用技術(shù)開發(fā)有限公司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。
HJ/T 35-1999 固定污染源排氣中乙醛的測定 氣相色譜法
HJ/T 35-1999 固定污染源排氣中乙醛的測定 氣相色譜法
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。
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
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 (Shandong) Application Technology Development Co., Ltd. has established a headspace gas chromatography method for the determination of acetaldehyde in air and exhaust gas, and optimized the chromatographic conditions 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.
HJ/T 35-1999 Determination of Acetaldehyde in Exhaust Gas from Fixed Pollution Sources Gas Chromatography Method
HJ/T 35-1999 Determination of Acetaldehyde in Exhaust Gas from Fixed Pollution Sources Gas Chromatography Method
This standard is applicable to the determination of acetaldehyde in organized and unorganized emissions from fixed pollution sources.
Name: Stainless Steel Filled Column
Specification: 2m * 3mm
Model: 20% PEG-20M/GCS880 AW DMCS
Number: 20240812006
*High temperature: 240 ° C