TABLE 1.

Ion signals in the dynamic headspace of reference cultures produced over 24 h of incubation

Mass (amu)aReference organism
E. coliS. flexneriS. entericaC. tropicalis
33 (methanol)++++
39++
41+++
43++++
45 (acetaldehyde)++++
47 (ethanol)++++
49 (methanethiol)++++
53++
57 (1-butanol)b++++
59 (acetone)+++
61 (acetic acid)++++
69++
71++++
73 (2-butanone)c++
75+++
87++++
89 (2-methyl-1-butanol)d++++
91++
93++
95+
103+++
105+
109+
117++++
118 (indole)++
119+++
127++
132+
135+
145++
  • a Tentative assignments to specific VOCs are given in parentheses.

  • b Or fragments of 3-methyl-1-propanol (21).

  • c Or a fragment of 3-hydroxy-2-butanone.

  • d Or 3-methyl-1-butanol (8).