The SRA OLIS injection system is intended for the introduction,
in chromatography, of pressurized liquid samples which
may contain very polar, high boiling point or high viscosity
analytes.
The OLIS valve can accept samples up to 60 bar and can be
installed on all GC models, on-line or laboratory, equipped
with split/splitless injectors.
This valve, very easy to use, can be installed on a new or existing GC and requires little maintenance (change of seals),
easily achievable by the operator.
Its technical features make it possible to obtain performances identical and even better than those of the conventional
automatic injector with syringe.
The OLIS valve is composed of a “STEM”, the lower end of
which is machined to allow sample circulation. The sample
can circulate continuously or be pushed by a syringe for calibrations. The STEM is lowered to the spray chamber by
means of a micro-electric motor. At the same time, its tip is
heated to high temperature very quickly allowing the “flash”
vaporization of the liquid fraction trapped in the calibrated
volume.
This very simple mode of operation provides surprising
analytical results, with very little discrimination between compounds and better repeatability than automatic
injection with a syringe.
Advantages :
- stand-alone and easy to use systema nalysis of unstable liquid samples to be characterized
- very little discrimination between compounds
- adaptable to a new GC or an existing one
- maintenance: low maintenance and easy to carry out by the user
- better reproducibility than automatic injection with a syringe
Application fields:
- LPG, LNG, naphtha, condensate
- ASTM D-2887
- alcohols in hydrocarbons
- BTEX
CO2 dissolved
- Impurities in amino matrix.