Lovibond Tintometer MD 100 Manual De Instrucciones página 28

Chemical Method
Dimethylaminobenzaldehyde
Appendix
Interferences
Removeable Interferences
1. Interferences as a result of highly coloured or turbid samples: Mix 1 part deionised
water with 1 part household bleach. Add 1 drop of this mixture into a 25 ml water
sample and mix. Use 10 ml prepared sample in place of deionised water in point 1.
Note: For measuring water samples, an unprepared sample must be used.
Principle: hydrazine is oxidised by household bleach. Colour interference will be
eliminated by zeroing.
Interference
NH
+
4
C H NO
4 9
VO
3-
4
Derived from
DIN 38413-P1
EN Method Reference Book 1.0
from / [mg/l]
10
10
1
Hydrazine P / M205
EN
29