Formation of protonated phosphonates in the ion-trap mass spectrometer under electron impact conditions

Autor:	Raymond E. March, J. B. Plomley, N. Méchin, J. C. Tabet, T. Blasco
Rok vydání:	1995
Předmět:	Chemical ionization Chemistry Organic Chemistry Analytical chemistry Photochemistry Mass spectrometry Ion source Analytical Chemistry Ion Physics::Plasma Physics Ionization Mass spectrum Ion trap Nuclear Experiment Spectroscopy Electron ionization
Zdroj:	Rapid Communications in Mass Spectrometry. 9:5-8
ISSN:	1097-0231 0951-4198
DOI:	10.1002/rcm.1290090103
Popis:	The gas-phase behaviour of organophosphorus compounds such as diethylmethylphosphonate towards electron impact (EI) ionization occurring in a quadrupole ion-trap instrument is investigated. If all ions observed in conventional EI mass spectra are detected, ion/molecule reactions are seen to occur leading to formation of protonated molecules and adduct ions such as 2M+· and [2M + H]+. The keto-to-enol-like isomerization of the molecular M+· ion seems to favour proton transfer to neutral M species and a “self chemical ionization” ion is observed with corresponding fragment ions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e72d3de61cfce269d94f36efdebb25da https://doi.org/10.1002/rcm.1290090103 Zobrazit plný text záznamu Plný text