GC phthalates sampling bottle

[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.

[rb6banjo]

I believe that DEHP = DOP = bis-(2-ethylhexyl)-phthalate

When I worked in the pharmaceutical industry (back in the day), these were synonyms.

[In1274]

Yes, that's right, DEHP equals Bis(2-ethylhexyl) phthalate.

[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.

[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.