{"title":"Ion sources for mass spectrometry. II. Filaments for low temperature ion sources","authors":"L. Kelner, S.P. Markey, H.M. Fales, P.A. Cole , C.K. Crawford","doi":"10.1016/0020-7381(83)85007-4","DOIUrl":null,"url":null,"abstract":"<div><p>Two low power filaments (thin wire rhenium-and LaB<sub>6</sub>) have been designed to allow a chemical-ionization ion source to operate below 100°C. Both filaments simplified analysis of the thermally sensitive compound flurazepam using negative chemical-ionization mass spectrometry. The Lab<sub>6</sub> cathode is susceptible to poisoning from solvents with temporary loss of thermionic emission. This effect has been studied using various organic solvents.</p></div>","PeriodicalId":13998,"journal":{"name":"International Journal of Mass Spectrometry and Ion Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1983-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7381(83)85007-4","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mass Spectrometry and Ion Physics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0020738183850074","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Two low power filaments (thin wire rhenium-and LaB6) have been designed to allow a chemical-ionization ion source to operate below 100°C. Both filaments simplified analysis of the thermally sensitive compound flurazepam using negative chemical-ionization mass spectrometry. The Lab6 cathode is susceptible to poisoning from solvents with temporary loss of thermionic emission. This effect has been studied using various organic solvents.
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