分析化学2011，Vol.39Issue(10)：1470-1475,6.DOI:10.3724/SP.J.1096.2011.01470
真空紫外灯单光子电离源飞行时间质谱仪的研制
Vacuum Ultraviolet Single Photon Ionization Time-of-Flight Mass Spectrometer
谭国斌 1高伟 1黄正旭 1洪义 1傅忠 1董俊国 2程平 1周振1
作者信息
- 1. 上海大学环境与化学工程学院,上海200444
- 2. 广州禾信分析仪器有限公司,广州510530
- 折叠
摘要
Abstract
A home-made vacuum ultraviolet single photon ionization time-of-flight mass spectrometer (VUV-SPI-TOFMS) was introduced, including vacuum system, sampling inlet system, vacuum ultraviolet ionization source, reflection time-of-flight mass analyzer and data acquisition system. Single photon ionization with vacuum ultraviolet light is a particularly soft ionization technique. Volatile organic compounds (VOCs) with ionization energy less than the photon energy (10. 6 eV), could be ionized into molecular ions. It was nearly fragmentation free compared with electron ionization, and very suitable for qualitative analysis. The mass resolution of instrument was higher than 800 (Full width at half maximum, FWHM) and the mass accuracy was better than 1. 0 × 10-4. The initial experiments showed that more than 60 components from cigarette mainstream smoke could be detected, and the limits of detection for acetone, cyclohexane, ethyl acetate and toluene were 0. 33 X 10~6 (V/V), 0. 27×10-6(V/V), 0.42×10-6(V/V) and 0. 11 × 10-6(V/V) , respectively. This instrument could be used for real-time and on-line analysis for VOCs in various environmental media (gas, solid, liquid), and if combined with a membrane inlet system, heating device or purge and trap system, a higher sensitivity could be achieved.关键词
真空紫外单光子电离/软电离/飞行时间质谱仪/挥发性有机物/在线检测Key words
Vacuum ultraviolet single photon ionization/ Soft ionization/ Time-of-flight mass spectrometer/ Volatile organic compounds/ On-line analysis引用本文复制引用
谭国斌,高伟,黄正旭,洪义,傅忠,董俊国,程平,周振..真空紫外灯单光子电离源飞行时间质谱仪的研制[J].分析化学,2011,39(10):1470-1475,6.
