Iran Occupational Health

Background and Aims:Nowadays, many different techniques to extraction of chemical compounds from aquatic  samples have been introduced, for examples techniques based on the use of needles that were packed with some sorbents. Considering that so far no synthesis sorbent based on single-walled carbon nanotubes and sol-gel techniques for the extraction of toluene and methyl ethyl ketone from aquatic samples were not used, this study was conducted with this aim.

Methods: In this study, needles that were packed with single wall carbon nanotubes sorbent have been used to extraction of toluene and methyl ethyl ketone from aquatic samples and optimal extraction conditions (time - temperature extraction and the effect of salt)have been studied. Finally samples collected were analyzed with gas chromatograph-flame ionization detector.

Results: The best conditions for the extraction of toluene were at 50 ° C, 60 min, while for methyl ethyl ketone have been obtained at 50 ° C, 30 minutes. Reproducibility of extractions for toluene and methyl ethyl ketone was 9% and 14% respectively.

Conclusion: Results showed that needle trap technique has good performance in toluene and methyl ethyl ketone extraction with low concentrations in aquatic media. NTD with SWCNT is sensitive, simple, solvent less and in expensive. Equipment used in this technique is easy to carry out in the workplace.