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GC phthalates sampling bottle
Posted: Wed Jul 19, 2023 6:02 pm
by In1274
According to EPA method 606, for the determination of Bis(2-ethylhexyl) phthalate by gas chromatography, grab sample bottle employed is amber glass, fitted with a screw cap lined with Teflon, PTFE. ¿Is this cap suitable in terms of possible DEHP leaching? ¿Better bottles to be used?
Thank you in advance.
Re: GC phthalates sampling bottle
Posted: Wed Jul 19, 2023 7:42 pm
by rb6banjo
I believe that DEHP = DOP = bis-(2-ethylhexyl)-phthalate
When I worked in the pharmaceutical industry (back in the day), these were synonyms.
Re: GC phthalates sampling bottle
Posted: Wed Jul 19, 2023 8:30 pm
by In1274
Yes, that's right, DEHP equals Bis(2-ethylhexyl) phthalate.
Re: GC phthalates sampling bottle
Posted: Thu Jul 20, 2023 2:16 pm
by rb6banjo
So what's the problem? If the method says use that glass bottle and those caps for the sampling, then it should be suitable. I guess I'm not understanding your question.
Re: GC phthalates sampling bottle
Posted: Fri Jul 21, 2023 8:45 pm
by James_Ball
The teflon seals should be ok and not leach phthalates into the sample. Polyethylene seals would possibly leach and that is why teflon is suggested.