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Normal
There is usually nothing wrong with yellow crystals...If the yellowness does not dissolve in warm naphtha (out of which Dwitty's extract can of course be recrystallised) it is likely to be N-oxide. This is perfectly fine, SWIM's FOAF would not bother further.If it is really plant oils the ammonia wash will not help, oils are not supposed to be very soluble in aqueous solutions. Same goes for sodium carbonate, whereas sodium bicarbonate will have fairly disastrous results on the yield because it is not very basic; it gives a pH of around 8.6, which is enough to lose more than half of the spice.
There is usually nothing wrong with yellow crystals...
If the yellowness does not dissolve in warm naphtha (out of which Dwitty's extract can of course be recrystallised) it is likely to be N-oxide. This is perfectly fine, SWIM's FOAF would not bother further.
If it is really plant oils the ammonia wash will not help, oils are not supposed to be very soluble in aqueous solutions. Same goes for sodium carbonate, whereas sodium bicarbonate will have fairly disastrous results on the yield because it is not very basic; it gives a pH of around 8.6, which is enough to lose more than half of the spice.
