Tintometer Lovibond MD100 Manual página 24

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Chemical Method
DPD
Appendix
Interferences
Persistant Interferences
• All oxidising agents in the samples react like chlorine, which leads to higher results.
Removeable Interferences
• Interference from Copper and Iron (III) are eliminated by the addition of EDTA.
• Concentrations above 4 mg/l Chlorine, in the event of using fluid reagents, can lead
to results within the measuring range of up to 0 mg/l. In this case, the sample must
be diluted with chlorine-free water. 10 ml of the diluted sample should be mixed with
the reagent and the measurement taken again (plausibility test).
Interference
CrO
2-
4
MnO
2
Conformity
EN ISO 7393-2
determination of free, combined and total
a)
EN Method Reference Book 1.0
from / [mg/l]
0,01
0,01
Chlorine L / M101
EN
25