Cutting Fused Silica Capillary Columns per LC-GC Application Note September 30 2016

Polymicro Technologies (a division of Molex) was the first company to mass produce fused silica capillary for the entire capillary gas chromatography market. That was thirty years ago and they are still the single largest manufacturer of the materials. (Polyimide coated, fused silica capillary for GC columns was an HP invention, but they reserved their production for themselves, alone.) Polymicro has made more GC capillary than anyone on the planet, by far:...

Instructions: IQ’s Sapphire™ Wafers for Cutting GC Capillary Columns September 30 2016

Cutting capillary and making gas-tight seals is critical to good GC practice and making seals on silica press-fit connectors requires almost perfect cuts (unless you are using Pres2fit™ connectors). Cleanly cut ends are also important for CE for minimizing distortions of the electric field at the column ends.  Capillary: The first thing that the separation scientist needs to understand is that not all silica capillary is the same. There are...

Why do GC Capillary Connections Leak? August 01 2014

The 3 Leading Causes of Column Leaks Among some chromatographers, capillary connections using press fit connectors have a reputation for leaking. Where there was a time when this was true, that time has past. InnovaQuartz collected and studied leaks from the field for a period of three years; 28 of the leaks were in our own products (of over 1,000,000 sold in that same period) and most of those were...

How to Properly Cut Capillary Columns July 21 2014

Cleanly cut column ends are important in CE for minimizing electric field distortions, but in GC a bad cut can cause leaks or even catastrophic column failure.

Proper cutting technique eliminates glass fragment generation, minimizes the probability of cracks and provides a square cut that is free of chip and tangs with the circumference of polyimide intact.

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