GC Analysis of Nitrogen-Containing Herbicides in Water on a 5% Phenyl Column after SPME using 85 μm Polyacrylate Fiber

4 mL (water + 100ng/mL each analyte 1g/mL NaCl), pH 2, in 4.6 mL vial

polyacrylate, 85 μm (57304)

immersion, ambient temp., 50 min (constant stirring)

5 min, 230 °C

5% phenyl polysiloxane, 30 m × 0.25 mm I.D., 0.25 μm (Supelco equivalent, SLB-5ms, 28471-U)

40 °C (5 min) to 100 °C at 30 °C/min, to 275 °C at 5 °C/min

splitless, 230 °C

MS (Ion Trap Manifold: 250°C; scan range m/z=45-400 at 0.6 sec/scan)

helium, 40 cm/sec, set at 40 °C