Chemical ionization mass spectrometry: Oligomerization reactions in tight ion sources

✍ Scribed by Richard A. Hancock; B. S. Thyagarajan; Raymond Walder

• Book ID: 102557610
• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: English
• Weight: 399 KB
• Volume: 15
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210150209

✦ Synopsis

Abstract

Association of carbonyl compounds with protons to give cluster ions can be observed in conventional chemical ionization mass spectrometry. The variation of the relative ion currents of proton bound ‘dimers’ formed with acetone and methylethyl ketone have been examined as a function of ion source partial pressures. Multiple ion/molecule reactions with N‐methylol derivatives of amides and carbamates and repetitive losses of water give protonated oligomeric species. Ions having m/z values as large as 625 [M~6~H5H~2~O]^+^ have been detected in the chemical ionization spectrum of N‐hydroxymethylurethane (M).