Like the injection valve, the auxiliary valve is a 2-position, electrically-activated Rheodyne valve. This high-pressure PEEK valve is offered in two models: 6-port (with a port diameter of at least 0.009 in) and 10-port (with 0.010-in diameter ports).
NOTE
The Dionex Inuvion IC System can accommodate either an auxiliary valve or a regenerant pump, but not both.
The auxiliary valve enables a variety of sample preparation activities, including:
- Inline filtration
- Matrix elimination (for example, the removal of high backgrounds of chloride or organic material)
- Concentrator-based techniques
- Conditional injections (large loop or small loop applications where the data system monitors sample concentration and reinjects the sample, using the smaller loop, if the concentration is too high)
- AutoNeutralization™ is used when it is necessary to quantify anionic contaminants in concentrated bases. It solves the analytical problem of achieving good detection limits of trace anions in concentrated bases by neutralizing the base, using a membrane-based neutralizer device.
- Matrix diversion prior to MS (mass spectrometry) detection
The auxiliary valve can be installed on-site by a Thermo Fisher Scientific service engineer or by users.