106 Agilent 1260 Infinity II Preparative Autosampler User Manual
6
Optimizing Performance
Choice of Rotor Seal
Choice of Rotor Seal
Vespel™ Seal (for 1290 injection valves only)
The 1290 seal has sealing material made of Vespel. Vespel is suitable for
applications using mobile phases within the pH range of 2.3 – 9.5, which is
suitable for the majority of applications. However, for applications using
mobile phases with pH below 2.3 or above 9.5, the Vespel seal may degrade
faster, leading to reduced seal lifetime.
PEEK Seal (for 1260 injection valve only)
The 1260 injection valve has a sealing material made of PEEK. This material
has high chemical resistance and versatility. It is suitable for application using
mobile phases within a pH between 1 and 14.
Strong oxidizing acids such as concentrated nitric and sulfuric acids are not compatible
with PEEK.
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