Product details:
For over 30 years, Elementar has been the German pio¬neer in high temperature TOC analysis. Compared to low temperature UV–digestion or wet chemical methods (e.g. COD) to measure organic contaminations the high tem¬perature combustion developed by
Elementar provides a multitude of advantages:
• analysis time of 2–3min compared to
up to 1.5 hours in case of COD
• safe and environmentally clean
operation without con¬centrated acids,
oxydizing agents or other aggressive
chemicals or hazardous waste
• 100% C recovery independend from
sample type and matrix also with particle
or salt containing solutions
• simultaneous analysis of totally bound
nitrogen (TNb) in addition to TOC
• fully automatic operation with high
sample throughput and low analysis costs
The vario TOC cube is a totally new analyzer for TOC/TNb analysis for all types of samples from ultrapure (pharmaceu¬tical) water, drinking water, industrial waste water, suspen¬sions or solids with even very difficult sample matrices.
The basic concept combines for the first time the features of a high perfor¬mance water analyzer with a century of experience in or¬ganic elemental analysis of carbon in solids.
The measuring principle for all operation modes is the oxidation of bound carbon into CO2. The liquid sample is directly injected into the combustion reactor at 900°C in an air carrier gas stream. Solid samples are weighed in a tin container and fed automatically via a ball valve. The gas is dried, flow stabilized and finally measured with a NDIR detector. A connected PC calculates from the measured CO2 signal and the sample weight the total carbon con¬centration (TC).
Inorganic (carbonate) carbon (TIC) can be measured automatically by acidifying the sample in a sparger and stripping and detecting of the released CO2. The equation TOC=TC-TIC gives you the content of total organic car¬bon. In addition also the total bound nitrogen (TNb) can be measured simultaneously to TOC by means of NO sen¬sitive electrochemical (EC) or chemiluminescence (CLD) detectors.
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