Water I.D. Primelab 2.0, Руководство пользователя

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(16) Chlorine Dioxide
(in absence of Chlorine)
0.00 - 15.00 mg/l (ClO₂)
Tablet
Internal Name: 16-Chlorin-Dio-tab
10ml
DPD N°1 Photometer (TbsPD1)
Measurement procedure:
1 Fill 10 ml test water into a clean 24 mm cuvette.
2 Screw the lid back on the cuvette.
3 Insert the cuvette into the PrimeLab. Pay attention to the arrow on the front of the cuvette.
4 Start ZERO measurement.
5 Remove the cuvette again.
6 Unscrew the lid from the cuvette.
7 Empty the cuvette to a few drops.
8 Add 1 DPD N°1 Photometer tablet(s) to the test water in the cuvette.
9 Crush the tablet with a clean stirring rod.
10 Fill the cuvette to 10 ml with the sample water.
11 Stir with the stirring rod for about 20 seconds until the reagent is completely dissolved.
12 Screw the lid back on the cuvette.
13 Insert the cuvette into the PrimeLab. Pay attention to the arrow on the front of the cuvette.
14 Tap TEST to start a 00:10 minute(s) countdown.
15 After the lapse of a 00:10 minute(s) countdown the measured value is displayed.
Notes:
Turbidity caused by high concentration of calcium ions will affect the measurement result. To
prevent that, please use DPD HC (High Calcium) reagents.
Do not clean glassware and equipment with household detergents, as these could greatly
reduce the measurement result. To prevent any contamination, the cuvette, lid and stirrer
should be stored in a 0.1 % sodium hypochlorite solution for one hour. Then rinse with distilled
water, thoroughly.
The DPD reagent buffers the pH value of the sample water in the range of 6.2 to 6.5, which is
essential for colour development. If the sample water is very alkaline or acidic, this must be
adjusted to a pH within the range of 6 to 7 by addition of 0.5 mol/l sulphuric acid or 1 mol/l
caustic soda, respectively, before the DPD reagent is added.
T39/204 T39/204