Formation of protonated phosphonates in the ion‐trap mass spectrometer under electron impact conditions | Zendy

Méchin N. | Zendy; Plomley J. | Zendy; March R. E. | Zendy; Blasco T. | Zendy; Tabet J.C. | Zendy

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

Author(s) -

Méchin N.,

Plomley J.,

March R. E.,

Blasco T.,

Tabet J.C.

Publication year - 1995

Publication title -

rapid communications in mass spectrometry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.528

H-Index - 136

eISSN - 1097-0231

pISSN - 0951-4198

DOI - 10.1002/rcm.1290090103

Subject(s) - chemistry , electron ionization , ion , protonation , chemical ionization , ion trap , mass spectrometry , quadrupole ion trap , isomerization , molecule , mass spectrum , ionization , adduct , quadrupole mass analyzer , ion source , polyatomic ion , enol , photochemistry , organic chemistry , chromatography , catalysis

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.

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