ANATEL A643, Operator'S Manual, Page: 61 / 222

Anatel A643a - Anatel A643a Setup 61 of 220
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Operator Manual
Abrupt changes in the Profile Type can indicate a change in water chemistry. For example, a
change from a P2 to a P3 Profile Type at a TOC level of 10 ppb, indicates a contamination shift
towards more complex compounds. This comparison also is valid between water treatment
systems when TOC levels are similar. Simple organics, such as methanol, report P1 up to
moderate levels (in excess of 50 ppb). More complex organics tend to oxidize as a P3 Type at
all but the lowest levels (less than 10 ppb). In this instance, complex indicates either very large
organics with a high molecular weight or organics that contain some element which resists
oxidation. As TOC levels vary, the location of this transition shifts but the accuracy of the
measurement is maintained. Neither the Profile Type nor the analysis conditions cause any
variations in TOC readings.
The difference between the final equivalent TOC reading and the beginning reference value is
calculated at the end of oxidation to yield the TOC content of the sample. The results of the
analysis are then reported on the instrument and the C80 Controller, as well as output to the
printer.
Fig 5-17 : P1-Type Oxidation Curve
Fig 5-18 : P2-Type Oxidation Curve
Fig 5-19 : P3-Type Oxidation Curve
Conductivity
(microsiemens)
Time (minutes)
Conductivity
(microsiemens)
Time (minutes)
microsiemens
Conductivity
(microsiemens)
Time (minutes)