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J.Health Sci., 47(1), 21-27, 2001
Analysis of Aldehydes in Water by Head Space-GC/MS
Naeko Sugaya,*, a Tomoo Nakagawa,a Katsumi Sakurai,a Masatoshi Morita,b and Sukeo Onoderac
aYokohama City Institute of Health, 1-2-17 Takigashira, Isogo-ku, Yokohama 235-0012, Japan, bNational Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-0061, Japan, and cFaculty of Pharmaceutical Sciences, Tokyo University of Science, 12 Ichigawa-funagawara-machi, Shinjuku-ku, Tokyo 162-0826, Japan
The concentrations of formaldehyde, acetaldehyde, propionaldehyde, and n-butyraldehyde in water were quantitatively determined by head space-gas chromatography/mass spectrometry (HS-GC/MS). Aqueous aldehydes were treated with o-(2,3,4,5,6-pentafluorobenzyl)-hydroxylamine (PFBOA) in a sealed vial at 60°C for 60 min. Head space was then analyzed by GC/MS. In comparison with electron ionization (EI) mass spectra, negative chemical ionization (NCI) mass spectra of PFBOA derivatives gave more spectral peaks of structural origin and with simple, characteristic fragmentation patterns. HS-GC/MS is highly sensitive for aqueous aldehydes because it eliminates interference from the water sample. The concentrations of various aldehydes in tap water and commercial mineral water were determined by HS-GC/MS. The following concentration ranges were detected for the individual aldehydes; formaldehyde, not detected (N.D.)-59 mu g/l; acetaldehyde, N.D.-260 mu g/l; propionaldehyde, N.D.- 0.9 mu g/l; and n-butyraldehyde, N.D-0.3 mu g/l.
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