Determination of triazines and amides in water using solid phase microextraction coupled with GC-MS

Solid phase microextraction was coupled with gas chromatography-mass spectrometry (SPME-GC-MS) to screen for sixteen nitrogen-containing compounds, including herbicides, in water samples. The effects of stirring, extraction time, pH, salt concentration and the choice of fiber coating material were evaluated. The repeatability was in the range of 0.72–18.2 (CV % at 200 ng·L−1) and the reproducibility, in the range of 5.4–34 (at 500 ng·L−1).