title: Ring test for the determination of N-terminal valine adducts of styrene 7,8-oxide with haemoglobin by the modified Edman degradation technique.
abstract: A ring-test was organised between three laboratories using different versions of the modified Edman degradation technique for the gas chromatographic-mass spectrometric determination of N-terminal valine adducts of styrene 7,8-oxide. The analyses were performed on a sample of human haemoglobin reacted in vitro with styrene 7,8-oxide and on a set of five haemoglobin samples from mice dosed by i.p. injection of styrene. Strong correlations between the haemoglobin adduct determinations of the different laboratories were observed. However, covariance analysis revealed different slopes for the dose-response curves, indicating differences for the calibration of the reference globin or reference peptide.
authors.affiliation: Laboratory for Occupational Hygiene and Toxicology, Katholieke Universiteit Leuven, Belgium.
authors.forename: W
authors.initials: W
authors.lastname: Pauwels
authors.forename: P B
authors.initials: PB
authors.lastname: Farmer
authors.forename: S
authors.initials: S
authors.lastname: Osterman-Golkar
authors.forename: M
authors.initials: M
authors.lastname: Severi
authors.forename: R
authors.initials: R
authors.lastname: Cordero
authors.forename: E
authors.initials: E
authors.lastname: Bailey
authors.forename: H
authors.initials: H
authors.lastname: Veulemans
mesh_terms: D000478:Alkylation; D000818:Animals; D004305:Dose-Response Relationship, Drug; D004852:Epoxy Compounds / Q000737:chemistry / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006454:Hemoglobins / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D007274:Injections, Intraperitoneal; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D020058:Styrene; D013343:Styrenes / Q000008:administration & dosage; D014633:Valine / Q000737:chemistry / Q000378:metabolism*
chemical_list: D004852:Epoxy Compounds; D006454:Hemoglobins; D013343:Styrenes; D020058:Styrene; C013690:styrene oxide; D014633:Valine