User:Brian P. Josey/Notebook/2009/11/06
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Finishing the Great Scrub Down
All of the plastic ware and glassware is now clean, except for one piece. I am still having a hard time with the pipette tip holder that is soiled with the malachite green. I've tried water, soap and water, isopropanol, ethanol, methanol, acetone and even made it lemony fresh, and it is still stained all over with the malachite green. I can't think of a way to get it out, we may just have to accept that the piece is contaminated beyond repair.
I did notice that after washing with soap and water, isopropanol and making it lemony fresh, the malachite green stains then had a white fringe around them. I don't know why this would happen. I was thinking of trying a different solvent, like a ammonia since there were nitrogen groups in it, or benzene or benzoin because of the phenol groups. I could even go all the way to alkanes like ligroin or hexanes but that seams like it would be too much effort, and I doubt that any of them will work as a way to get it out. What is it supended in while in solution? That might work. Maybe I should heavy water, it is 0.1% magic.