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	An in-source helical membrane inlet single photon ionization time-of-flight mass spectrometer for automatic monitoring of trace vocs in water
	Wu, Chenxin1,2; Liu, Wei1,2; Jiang, Jichun1; Wang, Yan1,2; Hou, Keyong1; Li, Haiyang1
刊名	Talanta
	2019-01-15
卷号	192页码:46-51
关键词	In-source Helical membrane Single photon ionization Automatic monitoring Trace vocs Water
ISSN号	0039-9140
DOI	10.1016/j.talanta.2018.09.013
通讯作者	Hou, keyong(houky@dicp.ac.cn) ; Li, haiyang(hli@dicp.ac.cn)
英文摘要	An in-source, helical membrane inlet single photon ionization time-of-flight mass spectrometry (spi-tofms) has been developed to improve the detection sensitivity of trace volatile organic compounds (vocs) in water. a helical winding membrane and a four-stage differential pumping system of tofms was designed to improve and maintain the vapor pressure of analyte, which is linearly associated with the sensitivity of spi. the helical winding increased the length of the hollow fiber membrane (hfm) from 7 cm to 100 cm and the pressure inside of spi source was elevated from 3.6 pa to 28 pa, and then the sensitivity was increased by 16, 34.7, 32.3, 17.9 and 13.9 times for benzene, ethyl tert-butyl ether (etbe), aniline, p-xylene, and chlorobenzene (mcbz) respectively. the limits of quantitation (loqs) of benzene, etbe, aniline, p-xylene and mcbz were 0.014, 0.143, 0.556, 0.036, 0.025 mu g l-1 respectively with a measurement time of 50 s, which were enhanced by more than one order of magnitude compared to our previous work (reference [32]). the in-source design of helical winding membrane i.e. putting the membrane inside the spi source dramatically reduced the response time to 1.33 min. this system has been evaluated for vocs in sewage water of different laboratory buildings and automatic monitoring the pollutants in sewage water from a biological laboratory building. the automatic continuous analysis of organic pollutants in water has very important significance and broad application prospect for online assessment of water quality.
WOS关键词	VOLATILE ORGANIC-COMPOUNDS ; COMPLEX AQUEOUS SAMPLES ; CHEMICAL-IONIZATION ; ONLINE MEASUREMENT ; REAL-TIME ; INTERFACE ; MIMS ; AIR ; CONTAMINANTS ; QUANTITATION
WOS研究方向	Chemistry
WOS类目	Chemistry, Analytical
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000449443900007
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373085
专题	大连化学物理研究所
通讯作者	Hou, Keyong; Li, Haiyang
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wu, Chenxin,Liu, Wei,Jiang, Jichun,et al. An in-source helical membrane inlet single photon ionization time-of-flight mass spectrometer for automatic monitoring of trace vocs in water[J]. Talanta,2019,192:46-51.
APA	Wu, Chenxin,Liu, Wei,Jiang, Jichun,Wang, Yan,Hou, Keyong,&Li, Haiyang.(2019).An in-source helical membrane inlet single photon ionization time-of-flight mass spectrometer for automatic monitoring of trace vocs in water.Talanta,192,46-51.
MLA	Wu, Chenxin,et al."An in-source helical membrane inlet single photon ionization time-of-flight mass spectrometer for automatic monitoring of trace vocs in water".Talanta 192(2019):46-51.

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