The pH range of PEEK laboratory tubing and fittings- Tech Information

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ARTICLES, APPNOTES, FAQ (9289)
- AppNotes Library (1888)
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- Frequently Asked Questions?? (3402)
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May 12, 2012
Bill Ciccone

ARTICLES, APPNOTES, FAQ / Chromatography Accessories & Supplies Information / Column Hardware FAQ / Fittings & Tubing for HPLC FAQ / Fittings Connectors Nuts Ferrules Information / Frequently Asked Questions?? / HPLC Column Information / Tubing Information

According the some manufacturers of PEEK, the useful pH range of PEEK tubing and fittings for HPLC is 2 – 14 for use with HPLC solvents and buffers.

However, I would be very careful with pH 0 to 6 for long term exposure. PEEK is manufactured using phosphoric acid and some of the granulate may even still contain this acid, meaning that this acid should be a strong reagent for PEEK.

I suggest a higher pH as starting point for solutions with medium to high ionic strength for long term exposure.

Click HERE for PEEK laboratory tubing ordering information

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