Page 11 - 6_TOC in daily practice
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Sum parameter – Total Organic Carbon
TOC-4200 -
High Sensitivity Measurement Option
SCA-130-605
Ultra pure water is one of the most widely When industrial processes require large
used reagents in industry and its quality is volumes of ultra pure water, it is
therefore of utmost importance in all industrial recommended to monitor its TOC content
processes. Quality control has, for many continuously.
years, been carried out and documented via
conductivity measurements, which provide an ■ TOC-4200
assessment of the concentration of all
inorganic species present in water. This
detection method does not take organic
pollutants into account, as they typically do
not contribute to conductivity. Organic
pollutants can, however, greatly influence
further industrial processes and it has
become increasingly more important to
include quantitative determination of all
organic species in quality control of water The high-performance TOC-4200 analyzer
samples. applies catalytic combustion at 680 °C. Three
TOC analysis methods can be selected
depending on the sample characteristics:
difference method, addition method, direct
method. Due to the automatic dilution
function TOC analyses up to 20,000 mg/L are
possible. In order to measure the total bound
nitrogen (TN b), the TOC-4200 can be
extended with a specific module.
The self-calibration option and an automatic
dilution function enable a virtually
independent operation of the measuring
system which can be started and calibrated
from one measuring station. The different
measuring streams can be selected.
■ TOC (Total Organic Carbon) Numerous status and alarm signals simplify
The TOC value (Total Organic Carbon) can detection of exceeded limit levels and
be used as a sum parameter for organic indicate the need for maintenance. A
compounds. Similar to conductivity signals Modbus communication channel
composed of various ionic compounds, the complements the conventional
TOC value is a measure of the contribution of communication modes. An optional web
the numerous organic compounds present in browser gives access to the instrument from
a water sample. any networked computer.
