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GC Selectivity Questions
Polycyclic Aromatic Hydrocarbons
• Need to separate benzo b, j, and k
fluoranthenes?
– Rxi-17Sil MS (50% diphenyl type)
• Need to separate chrysene and
triphenylene?
– Rxi-XLB (close elution though)
• Rt-PAH? (liquid crystal)
– Separates chrysene, triphenylene
– Benzo b and j fluoranthenes coelute
– Narrow temperature range (80-285
°
C)
New!