Otimização e validação de métodos analíticos para determinação de BTEX em água utilizando extração por headspace e microextração em fase sólida

Química Nova

Fernanda F. Heleno¹  Aniel C. Lima¹  Robson J. C. F. Afonso¹  Mauricio X. Coutrim¹ 

[1] ,Universidade Federal de Ouro Preto Departamento de Química Ouro Preto MG ,Brasil

关键词: SPME;    headspace;    BTEX;   

DOI  :  10.1590/S0100-40422010000200019

来源: SciELO

【 摘 要 】

Three analytical methods for the determination of BTEX in water were optimized and validated. With the best method the analytes were extracted of 10 mL of sample with 2.50 g of NaCl in headspace vial of 20 mL by HS and SPME to 40 ºC for 30 min for adsorption and to 250 ºC for 4 min for desorption and were analyzed by GC-MS. The recovery was between 97.9% and 104.3%, and the limit of detection was 2.4 ng L-1 for o-xylene. This method was using to analyze BTEX in water supply and surface water in Ouro Preto city. No sample had concentrations of BTEX above the legislation.

【 授权许可】

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