CLSA 9000

 

 


CLSA 9000

 

 

CLSA 9000 System

If you are looking for a system that...
is easy to install, set up, run an maintain...
will lower your costs per analysis...
allows detection of organics in water at low ppb levels...
then you should take a close look at the CLSA 9000 now!



How the CLSA method works

Organic substances are liberated from drinking water and
transfered to a very small amount of charcoal in a hermetically
closed circuit system, in which the carrier may be air or an
inert gas. The organic substances are dissolved from the charcoal,
separated by Capillary Gas Chromatography (GC) and
identified by Gaschromatography/Mass Spectrometry
(GC/MS). In unpolluted water, hundreds of substances up to
C24 are detected at concentrations down to 1 in 1013 (w/w).


Take full advantage of the CLSA method



Scheme of the analysis (click to enlarge)
Scheme of the analysis

Almost no problems with purity of purge gas
due to the closed loop system, impurities in the
relatively small volume of purge gas are negligible.
Minimum artifacts due to filter bed material
the method works with very small amounts of
trapping material (usually 1.5 mg of activated
charcoal).
Extremely clean blanks
the sample extraction involves only 5-15 ul of CS2
or other solvents.
Ultrahigh sensitivity
good mass spectra can be obtained for most
purgeqable compounds in the 1-10 ppt range (ng/
litre)
Easy to run
filter traps are easily accessible and exchangable.
Short solvent extraction times (usually about 10
minutes) facilitate the routine work.
Method limitations:
Recovery of highly volatile compounds such as
chloromethane, methylene chloride, chlorophorm
etc. is somewhat poor. However, the small
breaktrough of theese compounds does not eliminate
them completeley, because, due to the closed
loop system, these compounds are continuously
reloaded on the filter trap.



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