Agilent InfinityLab LC Series Vialsamplers User Manual 175
5 Optimizing Performance
Choice of Rotor Seal
Choice of Rotor Seal
Vespel™ Seal (for 1290 Infinity II Vialsampler 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 most applications. However, for applications using mobile phases
with pH below 2.3 or above 9.5, the Vespel seal can degrade faster, leading to
reduced seal lifetime.
PEEK Seal (for 1260 Infinity II Vialsamplers 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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