I found 2 characteristic peaks at 204 nm and 251.5 nm in the UV-Vis spectrum of the ethanol solution hold inside the turned-yellow (old) PE bottle for about two weeks. After that the bottle turn white, look much better than the initial state. I suppose that the degradant was extracted into the ethanol solution. One peak at 204 nm is similar to characteristic peak of pure BHT. I wonder if the second peak 251.5 nm is characteristic for the degradant of BHT or for certain substance that makes the bottle yellow. Who can tell me something about this peak?
Thanks in advance.
Dear Peter Kapusta!
Thanks for your interest in my question. From the literature, I've known that BHT is widely used in production of LDPE bottle as antioxidant. I specially run the spectrum of ethanol solution of pure BHT, and observed the characteristic peak at 204 nm, consequently, it's asumed as the characteristic peak of BHT. How about your opinion? Looking forward to hearing from you.
Best regards!
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