Evaluation of analytical methods for BTEX analysis in water using extraction by headspace (HS) and solid phase microextraction (SPME)

Química Nova

Heleno, Fernanda F.¹  Universidade Federal de Ouro Preto, Ouro Preto, Brasil¹  Lima, Aniel C.¹  Coutrim, Mauricio X.¹  Afonso, Robson J. C. F.¹ 

关键词: SPME;    headspace;    BTEX.;   

DOI  :  10.1590/S0100-40422010000200019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown