Florisil column cleanup was conducted according to
the AOAC method (1995, Chap. 10). 250 ml DCM-PE
(20:80, % v/v), followed by 150 ml DCM, was used as
elution solvent, which was a modification to the AOAC
method. The eluate was evaporated, and before reaching
complete dryness the solvent was exchanged using a few
milliliters ofn-hexane. The evaporation was continued
until only a thin film of solvent was in the flask. The
internal standard solution was used to dissolve the res-idue and to adjust the volume to 5 ml (final volume).
Florisil column cleanup was conducted according tothe AOAC method (1995, Chap. 10). 250 ml DCM-PE(20:80, % v/v), followed by 150 ml DCM, was used aselution solvent, which was a modification to the AOACmethod. The eluate was evaporated, and before reachingcomplete dryness the solvent was exchanged using a fewmilliliters ofn-hexane. The evaporation was continueduntil only a thin film of solvent was in the flask. Theinternal standard solution was used to dissolve the res-idue and to adjust the volume to 5 ml (final volume).
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