期刊
ANALYST
卷 146, 期 13, 页码 4365-4373出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1an00696g
关键词
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资金
- National Key Research and Development Program of China [2016YFB0600301]
- National Natural Science Foundation of China [21873003, 91961107, 21473193]
- Natural Science Foundation of Hubei Province, China [2018CFB712]
- Postdoctoral Science Foundation of China [2018M642561]
- Open Foundation of Key Laboratory of High Power Laser and Physics, Chinese Academy of Sciences [SGKF202106]
- Institute of Energy, Hefei Comprehensive National Science Center [GXXT-2020-004]
The novel SE-LIAD/TOF-MS technique described in this study allows for fast and efficient mass spectrometry analysis with high sensitivity, particularly for non-acidic, non-basic, or non-polar species. The method demonstrates enhanced signal detection compared to standard LIAD methods, and offers rapid qualitative and quantitative analysis capabilities with good sensitivity.
A novel, compact and sensitive SE-LIAD/TOF-MS has been described. It facilitates fast sample preparation, and a full mass spectrum is acquired efficiently and sensitively. More importantly, it features the detection of non-acidic and non-basic or non-polar species, which is not suitable for determination by ESI and MALDI techniques. In this technique, standard samples, carbazole and melamine, are prepared on a Ti foil with a quartz plate attached to the backside of the Ti foil to perform a laser-induced acoustic desorption experiment (SE-LIAD) coupled to TOF-MS for analysis. Enhanced signals are observed with about 5.6 to 13.8 times higher than that obtained in the standard LIAD method, dependent on different ionization techniques. Compared to the EI spectra, the PI spectra for both species show intact and sharp molecular peaks. The limits of detection (LOD) of melamine were evaluated experimentally in the range from similar to 2-6 pg (EI/MS mode) to similar to 0.3-0.5 ng (VUV-SPI/MS mode). Thus, the method in this study exhibits rapid qualitative and quantitative analysis with good sensitivity, being free of the complex matrix influences.
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