TABLE 1

Identification of 28 compounds that can be categorized into five broad chemical classesa

ClassCompounds
AlcoholsMethanol, ethanol, isopropyl alcohol, 2-methyl-2-propanol, 2-methyl-1-propanol,
1-butanol, 2-butanol, 3-methyl-1-butanol, 2-methyl-1-butanol
EstersAcetic acid methyl ester, acetic acid ethenyl ester, acetic acid propyl ester,
butanoic acid methyl ester
Ketones3-Methyl-2-butanone, 2-pentanone, 3-pentanone, 2,3-pentanedione,
3-methyl-2-pentanone, 3-hydroxy-2-butanone, 2,3-hexanedione, 3-hexanone,
cyclo-pentanone
Nitrogen-containing compoundsTrimethylamine, nitromethane, pyrazine*, acetonitrile*
Sulfur-containing compoundsMethanethiol, carbon disulfide, dimethyl disulfide
  • a Of the 126 distinct VOCs detected, we were able to identify the chemical structures of 28 compounds, which can be categorized into five broad chemical classes. Asterisks indicate compounds detected in the ISP2 medium blanks but not the GA medium blanks.