• Repeat the elution with 5 mL of n-pentane/DCM (40:60 v:v) to collect the
fourth fraction.
• Repeat the elution with 5 mL of DCM to collect the fifth fraction.
• Finally, repeat the elution with 5 mL of methanol to collect the sixth
fraction.
• Add an appropriate amount of surrogate standard to each fraction.
• Reduce the individual fractions to an appropriate analysis volume.
Further handling:
Measure all individual extracts separately by GC/MS or LC/MS
7.2 Analyses of Environmental Samples
145
fourth fraction.
• Repeat the elution with 5 mL of DCM to collect the fifth fraction.
• Finally, repeat the elution with 5 mL of methanol to collect the sixth
fraction.
• Add an appropriate amount of surrogate standard to each fraction.
• Reduce the individual fractions to an appropriate analysis volume.
Further handling:
Measure all individual extracts separately by GC/MS or LC/MS
7.2 Analyses of Environmental Samples
145
Précédent