Operating Manual GC 5000 BTX; Version 5 – 11/2010
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10 Functional description
This chapter refers especially to personnel who is in charge of
maintenance work or applications.
10.1 Measuring principle
The AMA BTX Analyzer is a system for automatic sampling, enrichment
and GC analysis, regarding the following organic substances:
The measurement is based on the principle of adsorption of compounds on
special materials in an enrichment tube and detection of the organic
compounds with the help of a FID or a PID detector after separation on a
capillary column of a GC.
Fig. 6: Time program (example):
1. Purging time sample line:
The sample line is purged with sample gas to make sure that actual
sample gas is available when starting the next step.
2. Enrichment on the BTX-tube:
A definite volume of ambient air (regulated flow with a thermal mass
flow controller, in the further text always called MFC) is sucked through
an enrichment tube (BTX-tube), which is filled with adsorbent
material.
3. Injection:
After enrichment the BTX-tube is heated in a very fast way and the
adsorbed materials are vaporized again and flushed onto the capillary
column of the gas chromatograph module.
Steps of
operation:
Содержание The GC 5000 BTX
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