Abstract
Alkylphenols and bisphenol A (BPA) in rivers in Chiba City were determined by gas chromatography-mass spectrometry (GC-MS) after extractive derivatization with ethyl sulfate. The relevance of the use of areas and their concentrations was investigated. Nonylphenol (NP) concentrations in the rivers in the surveyed areas ranged from 0.2 to 24μg·l-1, exceeding the No-Observed-Effect Concentration (NOEC) value (6.08μg·l-1). 5800μg·kg-1 NP and 170μg·kg-1 BPA were observed in bottom sediments from Hanamigawa and Yoshikawa, respectively. These values suggested NP and BPA accumulation in these rivers.
