The characterization and metastable decomposition of isobaric ions from several compounds are described by using high-resolution mass spectrometry (HR-MS) and mass-analyzed ion kinetic energy (MIKE) spectrometry. The
m/z 45 ions from 2-methoxyethylamine, CH
3OCH
2CH
2NH
2 (1) consists of two isobaric ions, methoxymethyl ion, CH
3OCH
2+, and C
2H
7N
+ ion. The former decomposes into the
m/z 29 ion by losing CH
4 in metastable time window. Although the latter decomposes into the
m/z 30 and 18 ions, its structure could not be confirmed in this study. The
m/z 69 ions generated from methyl trifluoroacetoacetate, CF
3COCH
2COOCH
3 (2) and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione, CF
3COCH
2COCF
3 (3) also consists of two isobaric ions, trifluoromethyl ion, CF
3+, and protonated carbon suboxide, OCCHCO
+. The former does not decompose into any ions in the metastable time window. On the other hand, the latter decomposes into
m/z 41 ion by losing CO.
抄録全体を表示