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8.1.1.5
pH Test
WARNING
General overview of the operation of the pH test:
The description below is for the TIC & TOC analysis mode. In systems built with TC and VOC analysis
modes, BioTector automatically carries out the corresponding operation phases as described in Sections
4.2.4.2 TC Analysis
and
Phase 1:
Prepare the test equipment, and start the test.
Phase 2:
The BioTector carries out a normal startup operation, including ozone purge, reactor purge,
pressure test and flow test to ensure that the system is purged and leak tight.
Phase 3:
The sample and TIC acid are added to the reactor, mixed and then the program pauses, to
allow the pH to be tested.
Phase 4:
The base is added to the solution in the reactor, and then the program pauses, to allow the
pH to be tested.
Phase 5:
The TOC acid is added to the solution in the reactor, and then the program pauses, to allow
the pH to be tested.
Phase 6:
The reactor and CO
pH Test, Phase 1:
P H
T E S T
1 <
R A N G E , V A L V E
2
M O D E
3
S T A R T
T E S T
4
T A K E
S A M P L E
5
C O N T I N U E
6
S T O P
T E S T
This menu enables the user to test the pH in the BioTector.
1. Range, Valve. Select the range and the stream or manual sample point the pH test is going to run on.
This function has an effect on the volume of sample, acid and base used for the test.
2. Mode. Depending on the analysis type of the BioTector, the test mode can be selected as TIC+TOC
mode or TC mode. In TIC & TOC systems, the only available test mode is TIC & TOC. In TC systems, the
only available test mode is TC. If the BioTector is a VOC system, the user can choose to run the test in
either TIC+TOC or TC modes.
The user must understand the procedure for testing the pH in the BioTector.
Use eye protection and gloves. Have all the relevant parts for this test ready
(primarily beaker and pH paper) before carrying out the test.
For the pH test to be accurate, the previous reaction should have finished
normally, so that any liquid carried over from that reaction will not affect the pH
test.
Significant volume of liquid loss, during the pH test phases 1, 2, 3 or 4
described below, have an impact on the consecutive pH tests. Therefore, it is
strongly recommended that the test is stopped upon completion of each
specific phase, where the volume of liquid is lost, and re-started from pH Test
Phase 1 below. When the pH test is re-started, the corresponding pH
measurements can be skipped for the previous valid tests.
4.2.4.3 VOC (POC) Analysis
analyzer are purged.
2
T O
N E X T
P H A S E
respectively.
0 9 : 1 7 : 2 8
1 2 - 0 9 - 0 2
1
,
S T R E A M
T I C + T O C
1
Page 80
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