Lovibond Tintometer MD 100 Manual De Instrucciones página 39

Chlorine HR PP / M111
Chemical Method
DPD
Appendix
Interferences
EN
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 8 mg/l Chlorine, in the event of using Powder Packs, 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).
Conformity
EN ISO 7393-2
determination of free, combined and total
a)
40 EN Method Reference Book 1.0