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Merck

Nitrogen-containing herbicides extracted from water

Nitrogen-containing herbicides extracted from water suitable for GC, application for SPME

Materiales

Fibra para SPME

Referencia del producto
Descripción
Precios

SPME fiber assembly polyacrylate (PA)

df 85 μm(PA, for use with manual holder, needle size 24 ga

CONDITIONS

sample/matrix

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

SPME fiber

polyacrylate, 85 μm (57304)

extraction

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

desorption process

5 min, 230 °C

column

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

oven

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

inj. temp.

splitless, 230 °C

detector

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

carrier gas

helium, 40 cm/sec, set at 40 °C