Measurement system for continuous determination of total organic carbon (TOC) in water with automatic sample preparation. Optional with TN measurement.
Function
Measurement system for determining total carbon (TC), organic carbon (TOC), inorganic carbon (TIC), or dissolved organic carbon (DOC) in water according to DIN 38409 Part 3 / EN 1484 and, optionally, total bound nitrogen (TNb) according to DIN 38409 Part 27. With automatic sample preparation for process analysis or for manual or automatic individual sample analysis.
Measured value display
Measured values are displayed in mg C/l and mg N/l respectively.
How it works
The determination is based on the thermal-ca-talytic oxidation of the water constituents to be
analyzed. Quantification is performed in an infrared analyzer. The gases detected are CO₂ for carbon
determination and NO for nitrogen determination (see also the „Analysis method“ data sheet).
In process analysis, operation is based on continuous sample water feed and automatic TIC elimination. For laboratory analysis, samples can be fed manually.
Our TOC analysis method
- The GO-TOC analyzers automatically take the required sample volume from a sample stream, a sample tank or a sample changer.
- The sample water is acidified to approximately pH 2 with an inorganic acid.
- The inorganic carbon fraction is removed from the sample as CO2 in a stripper tank, while the organic carbon remains in the sample.
- A dosing pump feeds the pre-treated water in a defined volume to the combustion chamber of the oxidation reactor.
- Air is drawn from the jacket of the oxidation reactor, freed of CO2 and introduced into the reactor together with the sample water as carries gas.
- In the oxidation reactor, the sample water is evaporated and the water constituents are combusted.
- Carbon species are quantitatively oxidized to CO2 and nitrogen species are quantitatively oxidized to NO.
- In the wash bottle, the water vapor share is kept constant.
- The cyclone Peltier cooler GO-PK 2 cools the gas mixture from the oxidation reactor and removes the water vapor formed. The condensate is collected and discharged via a siphon tank.
- Acid residues from the acidification step are retained in acid filters.
- The microprocessor-controlled gas analyzer determines the quantity of CO₂ / nitrogen formed (optional).
- The TOC share of the sample water is displayed in mg C/l. The nitrogen share is displayed in mg N/l (optional).
Facts
Equipment options
- Version for simultaneous analyses of TOC and TNb (bound nitrogen)
- Dilution unit
- GO-RIF in-line pipe filter
- Sampling point changeover
- GO-MC measurement container
- Analyzers from Siemens and ABB (freely selectable)
Benefits
- Continuous measured value recording
- Measurement according to DIN 38409 and EN 1484
- Online operation
- Automatic sample preparation
- Robust, proven technology
GO-TOC 100 P performance data
- NDIR gas analyzer
Ultramat 6 F / 6 EU / 6 E – 2 PU
ABB Uras26 - Minimum measurement range TOC
0 – 5 mg C/l (other measurement ranges on request) - Minimum combined TOC/TN measurement range (option)
TOC 0 – 5 mg C/l, TN 0 – 100 mg N/l - Dosing pump
4-channel dosing pump - Display
LCD multifunction display - Limit value outputs
4 - Output signals
0/2/4 – 20 mA interface / PROFIBUS interface optional / 6 potential-free relay contacts - Operating temperature of the oxidation reactor
850 °C - Ambient temperature
5 – 30 °C - Power consumption
max. 1,600 VA - Gas cooler
peltier cooler GO-PK 2 - Raw sample flow rate
approx. 250 ml/h - Measuring water flow rate
approx. 40 ml/h - Stripping and carrier gas
ambient air - Weight
approx. 95 kg - Mains connection
230 V, 50 Hz - Dimensions (H x W x D)
approx. 600 x 1,150 x 600 mm
