Each coil comes complete with fingertight PEEK fittings and ferrules, and has 150 mm of straight tubing at each end for connections. A very chemically inert Fluorocarbon suitable for low-pressure applications. Teflon is a naturally translucent white material, however SIS also offers this tubing in black for light sensitive applications. PTFE is gas-permeable, and will result in diffusion of atmospheric gases into fluids carried inside the tubing. This material has excellent resistance to buffers and mobile phases with higher ionic strength.
FEP tubing is recommended for low pressure and ion chromatography applications.
Another very inert Fluorocarbon, this material has extra-low permeability. PFA should be used when diffusion through the tubing wall is an issue. An economical choice for air, nitrogen, water, and other non-critical gas and liquid service in the laboratory. Not recommended for Hydrogen service. Tubing A Fluoropolymer with good chemical and high temperature resistance.