M. Del Olmo et al., Determination of bisphenol A (BPA) in the presence of phenol by first-derivative fluorescence following micro liquid-liquid extraction (MLLE), TALANTA, 50(6), 2000, pp. 1141-1148
Bisphenol A (BPA) in the presence of phenol is determined using a method ba
sed on first-derivative spectrofluorimetry. The proposed method involves a
micro liquid-liquid extraction of sodium chloride saturated water samples w
ith diethyl ether followed by direct fluorimetric analysis of extracts. The
excitation spectra of both compounds in diethyl ether are recorded between
200 and 290 nm, with the emission wavelength at 306 nm. The first-derivati
ve spectra were calculated, measuring the analytical signal for BPA at 239
nm. The concentration range over which the method was applied was 0.5-10.0
mu g.l(-1) of BPA with relative standard deviations of 2.9% for a concentra
tion of 4.0 mu g.l(-1) of BPA. The detection limit was 0.07 mu g.l(-1). The
proposed method was applied satisfactorily to the determination of BPA in
synthetic mixtures and water samples from different sources previously spik
ed with different amounts of these chemicals. Recovery values ranging from
93% to 112% were obtained for water samples. (C) 2000 Elsevier Science B.V.
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