title: [Identification of unknown peaks in foods during residual pesticide analysis].
abstract: Four unknown peaks were detected in GC chromatograms during analysis of organophosphorus pesticide residues in foods. They were identified by using GC/MS as triethyl phosphate (TEP), tributyl phosphate (TBP), diphenyl 2-ethylhexyl phosphate (DPEHP) and N-ethyltoluenesulfoneamide (NETSA), which are used as plasticizers or flame retardants in food packaging. These chemical substances were detected in the range of tr. (below 0.01 microg/g) to 11 micro/g from 29 samples, and they were also detected in the packaging. It was supposed that they were transferred to the foods from the packaging. Furthermore, they were detected in some cereals and cereal products which contain fat and had been preserved for a long time.
authors.affiliation: The Tokyo Metropolitan Institute of Public Health, 3-24-1, Hyakunin-cho, Shinjuku-ku, Tokyo 169-0073, Japan.
authors.forename: Sanae
authors.initials: S
authors.lastname: Tomizawa
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takano
authors.forename: Maki
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tamura
authors.forename: Yukinari
authors.initials: Y
authors.lastname: Tateishi
authors.forename: Naoko
authors.initials: N
authors.lastname: Sakai
authors.forename: Kyoko
authors.initials: K
authors.lastname: Kitayama
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nagayama
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Kamata
authors.forename: Kazuo
authors.initials: K
authors.lastname: Saito
mesh_terms: D005504:Food Analysis; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D010755:Organophosphates / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D000644:Quaternary Ammonium Compounds
chemical_list: D010755:Organophosphates; D010573:Pesticide Residues; D000644:Quaternary Ammonium Compounds; C039795:trimethylethylammonium; C009524:tributyl phosphate; C009549:triethyl phosphate