Analysis of benzene, toluene, ethylbenzene and xylenes in soils by headspace and gas chromatography/flame ionization detector

• Main Authors: Jurandir Pereira Pinto, Carmen Luísa Barbosa Guedes, Ilza Lobo, Rafael Augusto Melquiades
• Format: Article
• Language: English
• Published: Universidade Estadual de Londrina 2006-02-01
• Series: Semina: Ciências Exatas e Tecnológicas
• Subjects: BTEX; Headspace; CG-DIC; Solo.
• Online Access: http://www.uel.br/revistas/uel/index.php/semexatas/article/view/1869

The constituents of gasoline: benzene, toluene, ethylbenzene and xylenes (BTEX) are frequently found in soils due to leaks in fuel storage tanks and they present chronic toxicity. In this work it was developed and validated a methodology of BTEX analysis in soil by gas chromatography/ flame ionization detector and static headspace. The recovery of BTEX in soil samples was evaluated using soils with different textures (sandy and loamy). The analysis method showed good resolution, in a low time of analysis (less than 30 minutes). Limits of quantification of 0.05 mg Kg¯¹ soil for benzene, toluene, ethylbenzene and xylenes are below the guiding values that range from 0.15 to 95 mg Kg¯¹ soil, established to determine soil quality. It was verified that the methodology enables the use of this method for BTEX analysis of soil samples for passive environmental identification of gas stations.