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The resulting ions mass spectra were acquired using orthogonal time\u2010of\u2010flight mass spectrometer (O\u2010TOF MS). When using a copper target, the ions formed are simple complexes (CuM<jats:sup>+<\/jats:sup>) of copper ions with organic molecules. The possibility of online identification of trace amounts of alkanes in nitrogen and air, with a detection limit of ~10 ppb, was demonstrated. The ionization efficiency of volatile organic compounds through the formation of clusters with metal ions is 10<jats:sup>\u22124<\/jats:sup> in terms of the quasimolecular complex ions. The rate constants of ion\u2010molecular reactions of copper ions with octane and water molecules in nitrogen and air are estimated.<\/jats:p>","DOI":"10.1002\/jms.4723","type":"journal-article","created":{"date-parts":[[2021,3,15]],"date-time":"2021-03-15T07:35:26Z","timestamp":1615793726000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Ionization of organic molecules with metal ions formed in the laser plasma"],"prefix":"10.1002","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0700-6563","authenticated-orcid":false,"given":"Vasily V.","family":"Filatov","sequence":"first","affiliation":[{"name":"Chernogolovka Branch of the N.N. 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