| Ultrasensitive detection of volatile aldehydes with chemi-ionization-coupled time-of-flight mass spectrometry | |
| Yang, Bo; Xu, Ce; Shu, Jinian; Li, Zhen; Zhang, Haixu; Ma, Pengkun | |
| 2019-03-01 | |
| Source Publication | TALANTA
 |
| ISSN | 0039-9140 |
| Volume | 194Pages:888-894 |
| Abstract | The chemi-ionization reaction is a high-efficiency pathway to produce molecular ions in plasma, however, it has rarely been applied in mass spectrometry to directly produce analyte ions. In this study, a novel chemi-ionization technique for mass spectrometry was applied for the direct and ultrasensitive detection of gaseous aldehydes. The ionization technique was enacted by a recently observed chemi-ionization reaction: the efficient proton transfer from H2O to oxygenated compounds was stimulated by vacuum ultraviolet (VUV)-excited CH2Cl2. By analyzing a series of aliphatic aldehydes (C2-C5) and benzaldehyde with different proton affinities (PAs) and polarities, the ionization features of the new ionization method were investigated for the first time. The chemi-ionization of aldehydes presented soft ionization characteristics with fragmentation patterns analogous to that of VUV photoionization. The method showed ultrahigh sensitivities toward aldehydes (up to 1108 +/- 6 counts pptv(-1) for benzaldehyde in 10 s acquisition time). The corresponding 3 sigma limits of detection (LODs) achieved 0.30-0.69 pptv, which are equivalent of 1.35-1.92 ng m(-3), for the compounds investigated. The humidity experiments revealed that the moisture in the sample gas had an evident impact on the detection efficiency of the analyte and the influence was PA dependent. In addition, the applicability of this ionization mode was further tested by analysis of aldehydes in cigarette smoke. This study provides a promising ionization method for greatly improving the current on-line detection sensitivity of volatile aldehydes. |
| Department | 水污染控制实验室 |
| Keyword | Chemi-ionization Mass spectrometry Aldehydes On-line detection Photoionization |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/43287 |
| Collection | 水污染控制实验室 |
| Affiliation | 1.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Bo,Xu, Ce,Shu, Jinian,et al. Ultrasensitive detection of volatile aldehydes with chemi-ionization-coupled time-of-flight mass spectrometry[J]. TALANTA,2019,194:888-894. |
| APA | Yang, Bo,Xu, Ce,Shu, Jinian,Li, Zhen,Zhang, Haixu,&Ma, Pengkun.(2019).Ultrasensitive detection of volatile aldehydes with chemi-ionization-coupled time-of-flight mass spectrometry.TALANTA,194,888-894. |
| MLA | Yang, Bo,et al."Ultrasensitive detection of volatile aldehydes with chemi-ionization-coupled time-of-flight mass spectrometry".TALANTA 194(2019):888-894. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Ultrasensitive detec（3126KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment