Química Nova | |
Methods for analysis of PAH and BTEX in groundwater from gas stations: a case study in Campo Grande, MS, Brazil | |
Universidade Federal de Mato Grosso de Sul, Campo Grande, Brasil1  Ré-Poppi, Nilva1  Raposo Junior, Jorge Luiz1  Gebara, Sâmya Soler1  Universidade Federal da Grande Dourados, Dourados, Brasil1  Nascimento, André Luiz Carneiro Soares do1  | |
关键词: groundwater; aromatic hydrocarbons; HS-SPME/GC-MS/MS.; | |
DOI : 10.1590/S0100-40422013000700018 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
Two methods using headspace solid-phase microextraction and gas chromatography - mass spectrometry were developed for the determination of polycyclic aromatic hydrocarbons (PAH) and BTEX. Best results were obtained using DVB/CAR/PDMS fiber, with 10 min extraction at 25 °C and 0.15 min desorption at 260 °C (BTEX), and PDMS/DVB fiber, with 60 min extraction at 90 °C, 10% NaCl and 5 min desorption at 270 °C (PAH). LOD intervals were 3x10-2 - 5x10-2 µg L-1 (BTEX) and 1.6x10-3 - 1.4 µg L-1 (PAH). The methods were applied to forty-five groundwater samples from monitoring wells of gas stations and only benzene level exceeded the limit established by Brazilian regulations.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050596075ZK.pdf | 893KB | download |