15
TOC monitoring module (optional) operation principle
During recirculation stage a water sample is introduced into the TOC photooxidation
module where it is oxidized for several minutes. During this phase, water conductivity rises
because of the oxidation of organic molecules. The rise of conductivity is proportional to
TOC level of water.
After the oxidation phase is finished, water is released from the TOC photooxidation
module and its conductivity is measured by the conductivity sensor. TOC level is calculated
from the rise of conductivity.
Note:
As TOC level measurement is made during the recirculation stage,
the TOC level value is shown on the display only with storage tank
partially filled with water and during recirculation.
7. Specifications
The unit is designed for operation in cold rooms, incubators and closed laboratory
rooms at ambient temperature from +15°C to +30°C with maximum change at less than
2°C in 24 hours, in a non-condensing atmosphere and relative humidity between 20% and
80%.
Biosan is committed to a continuous programme of improvement and reserves the
right to alter design and specifications of the equipment without additional notice.
7.1.
Purified water specifications
Grade II water conductivity ......................................................................
<0.1 μS/cm
Grade I water resistivity .......................................................................
18.2 MΩ x cm
Grade I water conductivity .....................................................................
0.055 μS/cm
TOC................................................................................................................. <2 ppb
RNase (Labaqua Bio) ............................................................................. <0.01 ng/mL
DNase (Labaqua Bio) .................................................................................. <4 pg/mL
Bacteria ..................................................................................................... < 1 cfu/mL
Endotoxins
Labaqua HPLC ............................................................................................................................. <0.15 EU/mL
Labaqua Bio............................................................................................................................... < 0.001 EU/mL
Particles larger than 0.22
μm .................................................................... <1 per mL
Nominal flow, Grade II water ............................................................................ 10 L/h
Dispense flow, ultrapure water ....................................................................... 2 L/min
Dispense flow, pure water .............................................................................. 4 L/min
Deionization module life (standard module) ....................................................... 1 m3
Recovery ......................................................................................................... >30 %
