We describe here a simple sample pretreatment method,SPE combined with DLLME, for the sensitive determination
of carbamates in fruit and vegetable samples. The new
approach has numerous advantages such as simplicity of
operation, ultra preconcentration factor, low detection limit
and relatively short analysis time compared with other
conventional sample-preparation methods. This combined
method improved the selectivity and sensitivity of SPE and
DLLME. The performance of this procedure in the
extraction of carbamates from different matrices was
excellent. Accordingly, this method possesses great potential
in the analysis of ultra trace compounds in real samples.
Acknowledgements This work was supported by Education
Department of Hubei Province (grant no. T201101), the National
Nature Science Foundation of China (grant no. 20975030,
20835004), the Natural Science Foundation of Hubei province of
China (grant no. 2009CDB364), and the Specialist Fund of Hubei
University (020091130-ky2006004). The authors would like to
thank their colleagues for their valuable technical assistance.