Analysis of amides in the air by sampling with SPME and detection by GC-FID.
This paper proposes a solid-phase microextraction (SPME) method for the passive sampling and determination of N,N-dimethylacetamide (DMA) and N,N-dimethylformamide (DMF) in air by capillary GC with flame ionization detection. The optimized conditions for SPME method were grab sampling, polydimethylsiloxane/divinylbenzene fiber, extraction for 90 min at 25 +/- 2 degrees C, desorption for 3 min at 220 degrees C, and relative humidity 45 +/- 2%. Under these conditions, the method presented good linearity (R = 0.996), repeatability (%RSD 2.79 and 9.85 for DMF and DMA, respectively), and detection limit (0.021 and 0.024 mg/m3 for DMF and DMA, respectively).
Parreira
Fabrício Vilela
FV
Chemistry Department, ICEx, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
de Souza Bergo
Patrícia Luísa
PL
Rabelo de Carvalho
Ciomara
C
de Lourdes Cardeal
Zenilda
Z