کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5130838 | 1490857 | 2017 | 8 صفحه PDF | دانلود رایگان |
- GC-MS/MS applied to the analysis of tributyltin and pentachlorophenol in seawater.
- MeOH/MeOTMS mixture allowed gas chromatographic separation of underivatized tributyltin and pentachlorophenol.
- Method performance in compliance with the strict EU requirements.
Tributyltin (TBT) and pentachlorophenol (PCP) are listed as priority substances that warrant monitoring in the European Water Framework Directive (WFD 2000/60/CE), since TBT and PCP were identified as environmental endocrine disruptors and exhibit considerable toxicity toward both aquatic organisms and mammals even at very low levels.This paper shows a novel approach to analyze underivatized tributyltin (TBT) and pentachlorophenol (PCP) in seawater based on capillary gas chromatography-triple quadrupole mass spectrometry. The optimized extraction method for TBT an PCP in water involved liquid-liquid microextraction with toluene. The reduced extract was added with a solvent mix, composed of methanol and trimethylsilyl derivatives of methanol (MeOTMS), that allowed good chromatographic resolution of underivatized TBT and PCP, interacting as a lubricant along the glass liner during the injection phase.The proposed method showed good linearity and repeatability (RSD%<20% at 0.05 ng Lâ1 for TBT and 0.2 μg Lâ1 for PCP). The overall recoveries were 74% and 106% for TBT and PCP, respectively. Very low quantification limits that met the strict statutory and regulatory demands were achieved: 0.002 ng Lâ1 for TBT and 0.050 μg Lâ1 for PCP.
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Journal: Analytica Chimica Acta - Volume 975, 4 July 2017, Pages 70-77