Vol. 25 (2004), No. 1, pp. 25-32

Simultaneous Detection of Endocrine Disruptors of 4-Nonyl Phenols and 4-Octyl Phenols in Commodity Products Using Positive Chemical Ionization-Gas Chromatography/Mass Spectrometry

*Yokohama City Institute of Health, 1-2-17 Takigashira, Isogo-ku, Yokohama, 234.0011, Japan
**Tokyo Metropolitan Research Laboratory of Public Health, 3-24-1 Hyakunincho, Shinjuku.ku, Tokyo, 169-0073, Japan
***PerkinElmer Japan, 2-8-4 Kitasaiwai, Nishi.ku, Yokohama, 220-0004, Japan
****Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan

Alkyl phenol is the general name for phenol compounds with different length or branched alkyl groups. Among the alkyl phenol group, a series of chemicals called nonyl phenols and octyl phenols that have C 9 or C 8 alkyl chains at the para position relative to the phenolic hydroxyl group are used for additives of synthetic resin products and raw materials for non.ionic surfactants, are classified as the endocrine disruptors. In this study a rapid, highly selective and sensitive analytical method using positive chemical ionization (PCI).GC/MS has been established to determine trimethylsilyl derivatives of nonyl phenols and octyl phenols. Using this method, 18 isomers of 4.nonyl phenol and 8 isomers of 4.octyl phenol were separated and confirmed for the commercial resin products.