Siemens MicroSAM, Operating Instructions Manual, Page: 133 / 138

Glossary
MicroSAM
Operating Instructions, 06/2012, C79000-G5376-C560-07
131
Nonpolar
A nonpolar molecule does not have a permanent dipole moment. Nonpolar compounds are
highly soluble in nonpolar solvents. The solubility increases along with the similarity of the
interacting forces between the particles of the solvent and between those of the dissolved
compound.
Polarity
Polarity with regard to chemical compounds refers to the generation of separate charge
centers produced by the shifting of charges in groups of atoms, the result being that a group
of atoms is no longer electrically neutral. The electrical dipole moment is a measure of the
"polarity" of the molecule.
Process Gas Chromatography
Process gas chromatography:
● Is one of the most powerful measuring and analysis methods for process analytics.
● Is a procedure that is both discrete and extractive.
● Is frequently used for online monitoring of processes since the sequences are easy to
automate and a large number of components can be measured simultaneously.
● Can be used to separate and quantify the components of almost all homogenous
gaseous or liquid mixtures. It must be possible to vaporize the liquid components without
decomposition.
The individual components of a discrete sample pass through the column system at
different velocities, and are recorded in succession by a detector.
The time between sample introduction and recording of a substance at the detector (the
retention time) is characteristic of the substance and is used to identify it. The magnitude
of the detector signal is a measure of the volume concentration of the component in the
gas.
Propanone
Propanone (also acetone) is the simplest ketone. Acetone is a colorless liquid used as an
aprotic solvent and as an educt for organic syntheses.
Real-time
Real-time is the time which sequences require in the real world. The term defines that a
system must respond to an event within a defined time. The term does not provide any
information on the speed or processing performance of a system.