کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1169941 | 1491171 | 2008 | 6 صفحه PDF | دانلود رایگان |
A 80-cm length commercially available capillary coated with 95% polydimethylsiloxane and 5% polydiphenylsiloxane (TBR-5) was employed to carry out on-line extraction and preconcentration of dibuthyl phthalate (DBP) and di-2-ethylhexyl phthalate (DEHP) in the chromatographic system. The coated capillary was placed between the sample injection loop and the injection needle of an autosampler. Variables affecting the automatic in-tube solid-phase microextraction (SPME) were optimized. A Genesis C18 (5 cm × 4.6 mm i.d., 4 μm particle size) was employed as analytical column. The achieved limits of detection by use of diode array detection were 1 and 2.5 μg L−1, respectively. The proposed conditions have been applied to determine those compounds at low ppb levels (≤250 μg L−1) in aqueous samples. No matrix effect was found, and recoveries between 85 and 115% were obtained. The precision of the method was good, and the achieved intra- and inter-day variation coefficients were between 5 and 20%. The analysis time per sample was 20 min and any off-line pre-treatment of the samples was needed. The taken sample volume was 100 μL. Data on the application of the described method to the analysis of different water samples are presented.
Journal: Analytica Chimica Acta - Volume 610, Issue 2, 10 March 2008, Pages 268–273