Detection of sub-pptv benzene, toluene, and ethylbenzene via lowpressure photoionization mass spectrometry

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	Detection of sub-pptv benzene, toluene, and ethylbenzene via lowpressure photoionization mass spectrometry
	Shu, Jinian; Xu, Ce; Li, Zhen
刊名	ANALYTICA CHIMICA ACTA
	2017-04-29
卷号	964 期号:0 页码:134-141
关键词	Sub-pptv Lod Ultrasensitive Lppi-ms
英文摘要	This paper reports on the advanced development of an ultrasensitive method for the detection of benzene, toluene, and ethylbenzene (or BTE) by low-pressure photoionization mass spectrometry (LPPI-MS). The LPPI source is composed of a laboratory-assembled krypton lamp and a stainless steel cylindrical ionizer. A compact V-shaped mass spectrometer is coupled to the LPPI source with a set of ion immigration optics under dc bias. The fixed standard concentration (FSC) and fixed standard volume (FSV) method are employed to calibrate the sensitivities of the instrument. The corresponding detection sensitivity toward BTE is 4-7 counts/pptv and the 2 sigma limit of detection (LOD) is 0.5-0.8 part per trillion by volume (pptv). In addition, the measurement accuracy is 95%-105%, and the corresponding precision ranges from 3% to 15% and from 9% to 31% for the FSC and FSV methods, respectively. The stability (standard deviation) of LPPI-MS for a 1 ppbv BTE mixture is less than 0.025 (> 12 h). In the detection of BTE, water in ambient air is the most significant interfering factor, leading to the increased background, and inferior LODs of 1-2 pptv for BTE under an RH of similar to 90% is observed. Experimental results indicated that LPPI-MS is reliable for the detection of sub-pptv levels of BTE under laboratory conditions. (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39189]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Shu, Jinian,Xu, Ce,Li, Zhen. Detection of sub-pptv benzene, toluene, and ethylbenzene via lowpressure photoionization mass spectrometry[J]. ANALYTICA CHIMICA ACTA,2017,964(0):134-141.
APA	Shu, Jinian,Xu, Ce,&Li, Zhen.(2017).Detection of sub-pptv benzene, toluene, and ethylbenzene via lowpressure photoionization mass spectrometry.ANALYTICA CHIMICA ACTA,964(0),134-141.
MLA	Shu, Jinian,et al."Detection of sub-pptv benzene, toluene, and ethylbenzene via lowpressure photoionization mass spectrometry".ANALYTICA CHIMICA ACTA 964.0(2017):134-141.