為改善直接進(jìn)樣法中高濃度鹽對(duì)進(jìn)樣口、色譜柱和檢測(cè)器的污染,降低檢出限。
浩瀚色譜(山東)應(yīng)用技術(shù)開(kāi)發(fā)有限公司建立了頂空氣相色譜法測(cè)定空氣和廢氣中乙醛的方法,并對(duì)色譜條件和頂空進(jìn)樣條件進(jìn)行了優(yōu)化。結(jié)果:該方法的檢出限1.0μg,當(dāng)采樣體積為100 L時(shí),方法檢出濃度為0.01 mg/m3,室內(nèi)相對(duì)標(biāo)準(zhǔn)偏差為1.6%~5.0%,加標(biāo)回收率為95.2%~101.0%。結(jié)論:該方法有效地避免了直接進(jìn)樣法中高濃度鹽對(duì)進(jìn)樣口、色譜柱乃至檢測(cè)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(mǎn)意。
HJ/T 35-1999 固定污染源排氣中乙醛的測(cè)定 氣相色譜法
HJ/T 35-1999 固定污染源排氣中乙醛的測(cè)定 氣相色譜法
本標(biāo)準(zhǔn)適用于固定污染源有組織排放和無(wú)組織排放的乙醛測(cè)定。
名稱(chēng):不銹鋼填充柱
規(guī)格:2m*3mm
型號(hào):20%PEG-20M/GCS880 AW DMCS
編號(hào):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