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Oak Harbor, WA, October 17, 2012 — As chromatographers transition to UHPLC systems where pressures reach 15,000 psi or more, achieving a secure flow path among system components requires significantly enhanced performance from connection products — fittings and tubing. Additionally, greater demand for biocompatibility eliminates the conventional choice — stainless steel.
Recently, Senior Product Development Engineer Mark Hahn, provided insight into the development of IDEX Health & Science PEEK-Lined Stainless Steel tubing (PLS). “We found more and more chromatographers asking for nanoscale UHPLC tubing, that is also nonmetallic, so it can be used for bio- inert applications. Really, there is nothing on the market right now at that 1/1000 inch or 25 micron inner diameter (ID), so that’s what initiated this project. We experimented with a number of materials; and at the end of the day, nothing was as good or widely accepted as PEEK and stainless steel. From there, we developed a proprietary process to make a PEEK tube fit tightly inside a stainless steel tube with no gaps between them — which is very important for structural integrity and strength. And then, finally, we finished the tubing ends — these are fixed lengths of tubing — with a special tipping process that holds it all securely together even at pressures to 15,000 psi, and added our biocompatible, one piece UHPLC fittings on both ends.”
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