Page 6 - 1_Environmental analysis

SCA-130-102
A TOC-L CPN was used for the analysis. To
ensure efficient use of the instrument for
large sample quantities, the fully automated
dilution function and the additional high-salt
sample kit were applied. With a dedicated
function, samples could be diluted up to a
factor of 1:50. For the phenol-containing
wastewater, the sample was diluted by a
factor of 1:10. The high-salt sample kit
increases the lifetime of the catalyst for high
salt loads.
Fig. Combustion tube (of salt kit)
after the long term test
To test long-term stability, more than 300
injections of the saline wastewater were
compared.
The graph shows the stability of
measurement of over 300 injections with a
standard deviation of 1.7%. Mean value was
3042 mg/L.
In many cases, wastewater contains
particles. Where the wastewaters are not
filtered, the particles need to be held in
suspension by stirring. In order to prevent in
homogeneity of the particles by
sedimentation within the syringe body,
multiple injections from the same syringe may
not be carried out in this case.
■ Recommended Analyzer / Configuration
TOC-L CPN with normal sensitive Catalyst or
kit for high salt samples (B-Type-Scrubber)
ASI-L (40ml) with stirrer option (for samples
with particles) and External Sparge-Kit
■ Useful instrument parameters::
 Use of integrated dilution function for
automated sample dilution
 In the presence of particles: deactivation
of multiple injection via the syringe.