Page 24 - 5_TOC in daily practice

Sum parameter – Total Organic Carbon

TOC determination with solid module

SSM-5000A
No. SCA-130-513

In addition to aqueous samples, TOC CO 2, the generated gases are passed over a
determination can also performed on soil, mixed catalyst (cobalt/platinum) for catalytic
sludge, sedimentation and other solid post-combustion. The CO2 produced is
samples. By swabbing, the carbon in subsequently transferred to the detector in
attached residues can be measured for the main unit.
cleaning validation.
The SSM-5000A solid sample module does
In some regulation (e.g regulation for the not have its own detector, but is coupled to
acceptance of waste at landfills pursuant) a the NDIR detector of the main instrument
limit value for TOC is mentioned. (TOC-V or TOC-L).

The NDIR detector of the main unit contains a
tandem cell consisting of a long cell and a
short cell the long cell is used for water
analysis and a short cell for solid sample
analysis.
This configuration assures that the system
can be employed for measurements of solids,
while retaining its complete flexibility and

switching functionality between water and
solid sample analysis without any additional
The modular design of Shimadzu’s TOC conversion.
series supports straightforward combination
with a solid sample module. In this way, the ■ IC – Determination
instruments can also be employed for the The determination of the inorganic carbon is
analysis of solids. The SSM-5000A module carried out in a separate furnace of the
can be used in combination with TOC-L a module. Phosphoric acid is added to the
TOC-V wet-chemical. sample and the resulting CO 2 is purged at

200 °C and measured.
The solid module allows the separate
determination of TC (Total carbon) and the IC
(inorganic carbon). It has two different
sampling parts.
The module is fully integrated into the TOC
software (standalone and TOC-Control
software) which automatically calculates the
TOC-content.

■ TC – Determination
For the TC determination, a subsample of the
dried solids is weighed into a ceramic boat
and combusted at 900 °C in a stream of
oxygen. To ensure complete conversion to