Química Nova (Jan 2010)

Otimização e validação de métodos analíticos para determinação de BTEX em água utilizando extração por headspace e microextração em fase sólida Evaluation of analytical methods for BTEX analysis in water using extraction by headspace (HS) and solid phase microextraction (SPME)

  • Fernanda F. Heleno,
  • Aniel C. Lima,
  • Robson J. C. F. Afonso,
  • Mauricio X. Coutrim

DOI
https://doi.org/10.1590/S0100-40422010000200019
Journal volume & issue
Vol. 33, no. 2
pp. 329 – 336

Abstract

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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.

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