Methods for analysis of PAH and BTEX in groundwater from gas stations: a case study in Campo Grande, MS, Brazil

Química Nova

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