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Test 3 Bromine
Range:
0-10.0mg/l (ppm) Br
Colour change: Colourless - Purple/Red
1 Rinse test cuvette with sample leaving
two to three drops in the tube.
2 Add one DPD 1 tablet, crush tablet and then fill
with sample to the 10ml mark. Mix to dissolve
tablet fully and ensure no particles remain.
3 Take photometer reading immediately.
Result may drift on standing.
Test 4 Ozone
Range:
0-2.00mg/l (ppm) O
Colour change: Colourless - Purple/Red
1 Rinse test cuvette with sample leaving
two to three drops in the tube.
2 Add one DPD 4 tablet, crush tablet and then fill
with sample to the 10ml mark. Mix to dissolve
tablet fully and ensure no particles remain.
3 Take photometer reading immediately.
Result may drift on standing.
Note: The ozone test also responds to chlorine
and bromine. Pools using 'ozone with chlorine'
treatment systems, or other combined treatments
will produce a result at this stage representing the
ozone plus other treatment chemicals. To determine
ozone specifically requires an additional protocol
as follows:
Correction for Chlorine or Bromine
1 Fill a test cuvette with sample to the 10ml
mark. Add one DPD Glycine tablet, crush
and mix to dissolve.
2 Take a second clean test tube and add two to
three drops of solution from the first tube. Add
one DPD 4 tablet, crush and then make up to
the 10ml mark with the solution from Step 1.
Mix to dissolve tablet fully.
3 Take Photometer reading immediately. The
DPD Glycine complexes ozone in the sample
and the result displayed equates to chlorine
or bromine present in the sample only.
4 Subtract the result obtained in Step 3 from
the initial result to determine the ozone
concentration specifically.
Test 5 PHMB
(Polybiguanide Based Biocides)
2
Range:
Colour change: Yellow - Green - Blue
PHMB is the generic name for various
polybiguanide-based swimming pool biocide
treatment chemicals. These biocides are normally
sold under branded names such as Baquacil*
(Lonza), Softswim* (Biolab), Revacil* (Mareva)
and Nicosil* (NICO Norge).
Commercial products normally contain 20%
active PHMB. This test has been calibrated for the
management of pools using commercial products
of this defined strength. A factor will need to be
3
applied if products of a different strength are
being used. (*AII trademarks acknowledged).
1 Fill test cuvette with sample to the 10ml mark.
2 Add one PHMB tablet, crush
and mix to dissolve completely.
3 Take photometer reading immediately.
Test 6 pH-Phenol Red
Range:
Colour change: Yellow - Red
1 Fill test cuvette with sample to the 10ml mark.
2 Add one Phenol Red tablet, crush
and mix to dissolve completely.
3 Take photometer reading.
Test 7 Total Alkalinity
Range:
Colour change: Yellow - Green - Blue
1 Fill test cuvette with sample to the 10ml mark.
2 Add one Alkaphot™ tablet, crush
thoroughly and mix. Ensure all particles
have dissolved completely.
3 Allow to stand for one minute.
4 Take photometer reading.
Note: If a thin yellow layer is observed at the
bottom of the tube, the cuvette should be
thoroughly remixed before measurement.
Test Methods
0-100mg/l (ppm) as biocide
pH 6.5-8.5
0-500mg/l (ppm) CaCO
3
7
17
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