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  • Title: Determination of 4-nonylphenol, nonylphenol monoethoxylate, nonylphenol diethoxylate and other alkylphenols in fish and shellfish by high-performance liquid chromatography with fluorescence detection.
    Author: Tsuda T, Suga K, Kaneda E, Ohsuga M.
    Journal: J Chromatogr B Biomed Sci Appl; 2000 Sep 15; 746(2):305-9. PubMed ID: 11076083.
    Abstract:
    A simple and highly sensitive method is described for the HPLC determination of 4-nonylphenol (NP), 4-nonylphenol mono- (NP1EO) and diethoxylates (NP2EO) in fish and shellfish together with bisphenol A (BPA), 4-tert.-butylphenol (BP) and 4-tert.-octylphenol (OP). The NP, NP1EO, NP2EO and other alkylphenols in the samples are extracted with acetonitrile and the lipid in the sample extract is eliminated by partitioning between hexane and acetonitrile. After Florisil PR clean-up the sample extract is analyzed by HPLC with a fluorescence detection. Recoveries in Japanese smelt, carp and corbicura are 81.8-84.3% for NP, 83.5-84.3% for NP1EO, 90.5-96.2% for NP2EO, 70.7-72.9% for BPA, 71.0-73.4% for BP and 77.1-83.2% for OP spiked at 0.5 microg each chemical per 5 g of the fish and shellfish samples. The detection limits are 2 ng/g for NP, NP1EO and NP2EO, and 1ng/g for BPA, BP and OP.
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