An in-source stretched membrane inlet for on-line analysis of VOCs in water with single photon ionization TOFMS
Hou, K; Li, F; Chen, W; Chen, P; Xie, Y; Zhao, W; Hua, L; Pei, K; Li, H
HERO ID
2321102
Reference Type
Journal Article
Year
2013
Language
English
PMID
| HERO ID | 2321102 |
|---|---|
| In Press | No |
| Year | 2013 |
| Title | An in-source stretched membrane inlet for on-line analysis of VOCs in water with single photon ionization TOFMS |
| Authors | Hou, K; Li, F; Chen, W; Chen, P; Xie, Y; Zhao, W; Hua, L; Pei, K; Li, H |
| Journal | Analyst |
| Volume | 138 |
| Issue | 19 |
| Page Numbers | 5826-5831 |
| Abstract | An in-source, stretched, hollow fiber membrane (HFM) inlet has been developed to improve the sensitivity of on-line time-of-flight mass spectrometry (TOFMS) with a vacuum ultraviolet (VUV) lamp based single photon ionization (SPI) source for the direct analysis of liquid samples. A 2-cm HFM was stretched to 8 cm in length, and placed in the ion source and directly under the VUV lamp window with a distance of 15 mm. Compared with the conventional flow-through configuration under the same experimental conditions, the signal intensities of selected volatile organic compounds (VOCs) of methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), benzene, toluene and p-xylene were increased over 5-fold in magnitude, and the response time was shortened to one-third. The limits of detection (LOD) of MTBE, ETBE, benzene, toluene and p-xylene ranged from 0.25 to 1.3 μg L(-1) with a measurement time of 60 s, and three orders of linear range were obtained with correlation coefficients of 0.9972-0.9992. The present results suggest that the in-source stretched HFM is a simple and effective way to increase the sensitivity and shorten response time of the membrane inlet, and we believe that it will also be beneficial to other types of on-line mass spectrometer for the on-line analysis of VOCs in water with a VUV lamp based SPI ion source. |
| Doi | 10.1039/c3an00659j |
| Pmid | 23907373 |
| Wosid | WOS:000323722600041 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883250351&doi=10.1039%2fc3an00659j&partnerID=40&md5=83a6a60acaca89af75828cbd62c6a6da |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |