title: Tissue concentrations of methyl isobutyl ketone, methyl n-butyl ketone and their metabolites after oral or inhalation exposure.
abstract: Quantitative relationships between plasma, liver and lung methyl isobutyl ketone (MiBK) and methyl n-butyl ketone (MnBK) concentrations after oral or inhalation exposure were established. Their respective metabolites (4-methyl-2-pentanol, 4-hydroxy-methyl isobutyl ketone, 2-hexanol, and 2,5-hexanedione) were also quantified. Male Sprague-Dawley rats were exposed for 3 days to MiBK or MnBK vapors (4 h/day) or treated orally for 3 days with a MiBK- or MnBK-corn oil solution. Both ketones and their respective metabolites in plasma or tissue concentrations were determined by gas chromatography. MiBK and MnBK plasma and tissue concentrations increased in a dose-related manner with the administered dose irrespective of the route of administration. Metabolite concentrations, however, were influenced by the route of administration.
authors.affiliation: Département de pharmacologie, Faculté de médecine, Université de Montréal, Québec, Canada.
authors.forename: A B
authors.initials: AB
authors.lastname: Duguay
authors.forename: G L
authors.initials: GL
authors.lastname: Plaa
mesh_terms: D000280:Administration, Inhalation; D000284:Administration, Oral; D000818:Animals; D002849:Chromatography, Gas / Q000379:methods; D008099:Liver / Q000378:metabolism; D008168:Lung / Q000378:metabolism; D008297:Male; D008742:Methyl n-Butyl Ketone / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014018:Tissue Distribution / Q000502:physiology
chemical_list: D008742:Methyl n-Butyl Ketone; C005458:methyl isobutyl ketone