Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds

doi:10.1021/acs.analchem.6b00428

	Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds
	Jiang, Jichun 1,2; Wang, Yan 1,2; Hou, Keyong 1; Hua, Lei 1; Chen, Ping 1; Liu, Wei 1,2; Xie, Yuanyuan 1; Li, Haiyang 1
刊名	ANALYTICAL CHEMISTRY
	2016-05-17
卷号	88 期号:10 页码:5028-5032
ISSN号	0003-2700
DOI	10.1021/acs.analchem.6b00428
文献子类	Article
英文摘要	Soft ionization mass spectrometry is one of the key techniques for rapid detection of trace volatile organic compounds. In this work, a novel photoionization-generated dibromomethane cation chemical ionization (PDCI) source has been developed for time-of-flight mass spectrometry (TOFMS). Using a commercial VUV lamp, a stable flux of CH2Br2+ was generated with 1000 ppmv dibromomethane (CH2Br2) as the reagent gas, and the analytes were further ionized by reaction with CH2Br2+ cation via charge transfer and ion association. Five typical volatile sulfur compounds (VSCs) were chosen to evaluate the performance of the new ion source. The limits of detection (LOD), 0.01 ppbv for dimethyl sulfide and allyl methyl sulfide, 0.05 ppbv for carbon disulfide and methanthiol, and 0.2 ppbv for hydrogen sulfide were obtained. Compared to direct single photon ionization (SPI), the PDCI has two distinctive advantages: first, the signal intensities were greatly enhanced, for example more than 10-fold for CH3SH and CS2; second, H2S could be measured in PDCI by formation [H2S + CH2Br2](+) adduct ion and easy to recognize. Moreover, the rapid analytical capacity of this ion source was demonstrated by analysis of trace VSCs in breath gases of healthy volunteers and sewer gases.
WOS关键词	SINGLE-PHOTON IONIZATION ; SOLID-PHASE MICROEXTRACTION ; VACUUM-ULTRAVIOLET LAMP ; ION FLOW TUBE ; ORGANIC-COMPOUNDS ; SIFT-MS ; PHOTOELECTRON IONIZATION ; GAS-CHROMATOGRAPHY ; MEMBRANE INLET ; VUV-LAMP
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000376223500002
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170936]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	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.Chinese Acad Sci, Grad Univ, 19 Yuquan Rd, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Jichun,Wang, Yan,Hou, Keyong,et al. Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds[J]. ANALYTICAL CHEMISTRY,2016,88(10):5028-5032.
APA	Jiang, Jichun.,Wang, Yan.,Hou, Keyong.,Hua, Lei.,Chen, Ping.,...&Li, Haiyang.(2016).Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds.ANALYTICAL CHEMISTRY,88(10),5028-5032.
MLA	Jiang, Jichun,et al."Photoionization-Generated Dibromomethane Cation Chemical Ionization Source for Time-of-Flight Mass Spectrometry and Its Application on Sensitive Detection of Volatile Sulfur Compounds".ANALYTICAL CHEMISTRY 88.10(2016):5028-5032.