The
new EGM II is the only gas introduction module to use semi-automatic injection
sequencing that allows you to generate a calibration curve using just one
calibration gas. This innovative solution means that your laboratory no
longer has to handle and purchase numerous gas bottles, and you also
reduce total analysis times.
Principle of operation
The EGM
II is a semi-automatic sample introduction accessory for gas and liquefied gas.
The 10-fold rotary valve holds two sample loops; one for gas and one for
liquefied gas. The volumes of the sample loops are user definable, but 10 mL
and 100 µL (respectively) come as standard. In loading position the
sample gas flows through the sample loop to the vent. The loading sequence is
controlled by the EGM II; initiated either by pressing the purge button or as a
part of the injecting sequence. Depending on the mode (set by the
gas/liquids-switch) the corresponding venting valve is opened and the sample
gas flows through the sample loop.
After
loading the sample loop, the EGM II is ready to inject the sample into the
analyzer. By turning the rotary valve (automatically) the carrier gas forces
the sample out of the loop towards the heater and expansion vessel. This way
the gas is stabilized for pressure and temperature and if the sample is a
liquefied gas it is vaporized at the same time. From the expansion vessel the
sample gas is fed into the analyzer to be analyzed on Total Sulfur, Total Nitrogen
or Total Chlorine.