Vilchez - Determination of Bisphenol A in Water...

Published: Journal of Chromatographic Science, Volume 36, Number 11, November 1998, pp. 565-569.

Determination of Bisphenol A in Water by Micro Liquid–Liquid Extraction Followed by Silylation and Gas Chromatography–Mass Spectrometry Analysis
A. González-Casado, N. Navas, M. del Olmo, and J.L. Vílchez

A method for the determination of bisphenol A according to the European Union guideline, which establishes a limit of 0.1 ng/mL for organic pollutants in water, is proposed. The method involves a micro liquid–liquid extraction using dichloromethane followed by a silylation step. Identification and quantitation are performed with gas chromatography–mass spectrometry, using an HP-5MS column. The retention time is 7.02 min. Quantitation is carried out using single-ion monitoring (SIM) at m/z 73, 357, and 372. A clean-up is not necessary using SIM mode. Deuterated anthracene (²H₁₀-anthracene) is used as an internal standard. The method is applied to the determination of bisphenol A at very low concentration levels (10.0–250.0 ng/L) in different types of natural water samples. The detection limit obtained is 0.4 ng/L. Recovery efficiencies are close to 100% in all cases.

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