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Table 2 Ionization method and masses identified by the random forest method

From: Gram-negative and -positive bacteria differentiation in blood culture samples by headspace volatile compound analysis

Ionization Ion Identified masses [m/z] Tentative compound
EI-MS e 2 H2
IMR-MS Hg+ 34–36, 64, 66 H2S (34)a
Xe+ 35, 64, 76, 80
  1. EI-MS electron impact mass spectrometry; IMR-MS ion–molecule reaction mass spectrometry
  2. aSignalling at m/z 36 is 4.20 % of m/z 34 signalling which matches exactly the expected value of 4.21 % for the presence of the 34S isotope of H2S