Jorkest, SWIM finally had a little more time to get back to his d-limonene test.
If you recall, SWIM had 426 mg pure off white bufotenine. This was about 99% pure. SWIM went through a lot of trouble to purify it. The problem was that tiny amounts of xylene were present in the crystals and could be slightly tasted. So, SWIM wanted to remove all of the xylene by boiling the crystals in d-limonene. So he did that and the bufotenine melted and the d-limonene turned a little amber colored when the d-limonene started to boil. He decanted it and brown stuff precipitated out of the d-limonene. He decanted the d-limonene and dried the precipitates.
Well, SWIM just scraped up the precipitates and guess what! They only weigh 425 mg with little bits still stuck to the beaker. That's only 1 mg less than the starting material. While scraping out the precipitates, about 5 mg or more spilled out onto the floor. So for it to weigh only 1 mg less is not possible unless additional non-bufotenine material precipitated out of the d-limonene itself.
It smells like orange peels, but doesn't smell like d-limonene anymore. It's completely bone dry. It was dried for a few days at 155 F in a food dehydrator.
So definitely, when the d-limonene boils, some of the d-limonene impurities burn and precipitate out of the d-limonene along with the bufotenine when it cools down. That's why the bufotenine smells like dried orange peels instead of d-limonene.
SWIM's bufotenine is probably now about 10% burnt d-limonene impurities.
I think for this procedure, if you're going to boil the d-limonene, then high purity distilled d-limonene should be used.
Another option if using non-distilled food grade d-limonene is to maybe pre-boil the d-limonene, let it cool and pour off the d-limonene leaving behind all the burnt d-limonene impurities. Then you should be able to use the d-limonene for the bufotenine boil.
However, the added orange flavor is a benefit though. So you might not want to purify it more. But for those who want it 99% pure, you're going to maybe have to use high purity distilled d-limonene or pre-boil the food grade d-limonene, or just bring it to a simmer.