15
Test 2 TOTAL CHLORINE
Option 1: Range 0 - 5.00 mg/l (ppm)
Method: DPD
Colourless - Red
Carry out this test on the solution remaining from the Free Chlorine/5 test.
1
If any shock treatment chemicals have been added to the pool, add one DPD
Oxystop tablet, crush and mix to dissolve. Stand for one minute before
proceeding. This will prevent a response caused by the shock treatment
chemicals.
2
Add one
DPD No 3
tablet, crush and mix to dissolve.
3
Stand for two minutes.
4
Take photometer reading. Ensure the display shows the Chlorine-Total/5 test
is selected.
Reagents: DPD No 3 Re-Order Code: AP 031/1
Test 2 TOTAL CHLORINE (XT)
Option 2: Range 0 - 10.0 mg/l (ppm)
Method: DPD-XT Colourless - Red
1
Carry out this test on the solution remaining from the Free Chlorine test.
2
If any shock treatment chemicals have been added to the pool, add one DPD
Oxystop tablet, crush and mix to dissolve. Stand for one minute before
proceeding. This will prevent a response caused by the shock treatment
chemicals.
3
Add one
DPD-XT
tablet, crush and mix to dissolve.
4
Stand for two minutes.
5
Take photometer reading. Ensure display shows the Chlorine-Total/10 test is
selected.
NB: To obtain COMBINED CHLORINE residual subtract Free Chlorine result from
Total Chlorine result :-
ie Combined Chlorine = Total Chlorine - Free Chlorine
Reagents: DPD XT Re-Order Code: AP 033/1
Summary of Contents for Pooltest 25
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