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PrimeLab 1.0 Multitest Manual De Usuario página 210

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Ozone
(37)
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Note(s)
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If the sample water contains further reducing chemicals (e.g. chlorine,
activated oxygen, bromine etc.) this will also be detected and is included in
the test results.
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When preparing the measurement procedure it is important to avoid any
chlorine escaping, which can happen during pipetting and shaking the
sample. The measurement should be performed directly after sampling.
->
It is important that the measurement devices to be used have not been
cleaned with household detergent, as this would greatly influence the
measurement. To prevent any contamination the cuvette, the cuvette lid and
the stirrer should be stored in a 0.1 % sodium hypochlorite solution for one
hour and then thoroughly rinsed with distilled water.
->
The DPD reagent used in this procedure buffers the pH value of the sample
water in the range between 6.2 and 6.5 pH. If your sample water is very
alkaline or acidic this must be adjusted to a pH range between 6 and 7 by
the addition of 0.5 mol/l sulphuric acid or resp. 1 mol/l caustic soda before
the DPD reagent is added.
177
0 - 5.4 mg/l
Name on device: 37-Ozone-tab
(O )
3
Tablet
177

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