The scheme shows the principle of uniTOC with to different pathways for TIC and TOC and the principle of measuring the TOC value.
|method & detection||UV oxidation & NDIR (enhanced oxidation; configurable with reagent)|
|sample volume||20 mL loop (low range), 5 mL loop (high range)|
|period of measurement||6 to 15 min|
|measurement range||2 to 5000 ppb (low range), 15 ppb to 20 ppm (high range)|
|detection accuracy||~3 ppb or 2 % (whatever is greater)|
|ports||2 for samples | 1 for reagent|
|related norms||USP <643>, DIN 32645, EP 2.2.44, DIN EN 1484, CFR 21 part 11, IP 45|
|ambient parameters||relative humidity: 10 to 95 %, temperature: 10 to 45 °C|
|interface ports||analog (4 - 20 mA)|
|dimensions, weight, power||400 x 300 x 600 mm, 24 kg, 110 - 230 V, 50 Hz, 70 to 105 Watt|
|type of sample medium||from ground water to ultra pure water|
|sample temperature||10 to 50 °C|
|inlet pressure||< 1.5 bar|
|compressed gas||air, oxygen, nitrogen | free of carbon dioxide|
|inlet pressure of gas||nitrogen: 1 to 1.5 bar | oxygen: 3.5 to 5 bar|
The uniTOC is used for basic to ultra pure water applications (e.g. WFI - water for injection).
The uniTOC operates according to USP 643, DIN EN 1494, DIN32645 as well as EP 2.2.44.
The uniTOC is only suitable for liquid media such as ground, pure and ultrapure water, but not waste water or solids.
The uniTOC covers a TOC range from 2 ppb to 5000 ppb, but can cover a range from 15 ppb to 20 ppm in a so-called "high range" configuration. For higher concentration ranges, the addition of oxidation support reagent is recommended.
The uniTOC is independent of conductivity values, but it is not recommended to use it with solutions with a high salt content (e.g. seawater), as crystallization processes can clog the fluidics and even occupy them.
The uniTOC uses classical oxidation by means of UV radiation. The resulting carbon dioxide is then determined via a selective NDIR detector and the TOC value is thus determined.
The uniTOC is a classic online monitoring system, but can also be used in offline mode for measuring individual samples.
Yes, the uniTOC can be calibrated easily and intuitively under the user's guidance. In addition, the "low range" variant has an SST (system sustainibility test) function.
In addition to the calibration solutions, the pump hose must be changed at regular intervals and a new UV reactor inserted. After a subsequent calibration, the system is ready for use again.