I'm at the end(hopefully) of my first extraction and I was hoping somebody could field a question. I just did a STB in 2 batches, both 112 grams of MHRB. I separated the naptha using a infant nasal aspirator syringe. When I was done and was cleaning my tools, I noticed that the rubber tip of the syringe seemed softer that it was when I had started. My concern is that perhaps the material that it was made of was corroded by the naptha? Is it possible that this would leave a residue in my crystals? My first batch has mostly evaporated leaving an oily yellow material, the other batch is freeze precipitating currently, 4 hours in.
What are anybody's thoughts on this? Would doing a recrystalization using xylene fix the problem, if there is a problem?
Thanks for your thoughts
Add: As I've thought, what seems more likely that the tip touched the MHRB/lye solution. Still, I'd appreciate some feedback here.