Document Detail

Note: A novel vacuum ultraviolet light source assembly with aluminum-coated electrodes for enhancing the ionization efficiency of photoionization mass spectrometry.
MedLine Citation:
PMID:  24784688     Owner:  NLM     Status:  Publisher    
A novel vacuum ultraviolet (VUV) light source assembly (VUVLSA) for enhancing the ionization efficiency of photoionization mass spectrometer has been described. The VUVLSA composes of a Krypton lamp and a pair of disk electrodes with circular center cavities. The two interior surfaces that face the photoionization region were aluminum-coated. VUV light can be reflected back and forth in the photoionization region between the electrodes, thus the photoionization efficiency can be greatly enhanced. The performances of two different shaped electrodes, the coated double flat electrodes (DFE), and double conical electrodes, were studied. We showed that the signal amplification of coated DFE is around 4 times higher than that of uncoated electrodes without VUV light reflection. The relationship between the pressure of ionization chamber and mass signal enhancement has also been studied.
Zhixiang Zhu; Jian Wang; Keqing Qiu; Chengyuan Liu; Fei Qi; Yang Pan
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Publication Detail:
Journal Detail:
Title:  The Review of scientific instruments     Volume:  85     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-5-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  -    
Other Details:
Languages:  ENG     Pagination:  046110     Citation Subset:  -    
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