Unit for evolving inorganic carbon or sulfur in solid or liquid samples using acidification
Analysis begins with the introduction of a solid or liquid sample into the sample flask located at the base of the sample column assembly. While pre-weighted solid samples are typically introduced directly into the sample flask, liquid samples are usually introduced by syringe injection through the septum located at the head of the sample column assembly. Following sample introduction, a CO2-free carrier gas is used to purge the system of any atmospheric CO2 that may have been introduced with the sample. A pre-scaled volume of acid is then added to the sample flask through a single pump of the acid dispenser and sample acidification is complete.
Using the built-in heater and magnetic stirrer to facilitate more efficient digestion of the sample, pre-scrubbed carrier gas transports all volatile digestion products through a postscrubber and into the reaction cell of a CM5017 CO2 coulometer. There inorganic carbon present as CO2 is measured automatically by a 100% efficient coulometric titration.
When used for the determination of sulfur (by the Monier-Williams procedure), similar steps are taken to achieve the evolution of sulfur as SO2 which is, in turn, automatically titrated in the reaction cell of a CM5017S coulometer.
CM5330 – Acidification Module features:
- 10-, 25-, 50- or 100-ml reaction vessels
- Selectable volume acid dispenser
- Internal air pump with flow controller
- Controlled sample heating and stirring
- Pre-acidification scrubber for removal of CO2 from carrier gas
- Post-acidification scrubber for removal of interfering compounds released during sample digestion
CM5330-01 110V, 50/60Hz
CM5330-02 220V, 50/60Hz