Lovibond Tintometer MD 100 Manual De Instrucciones página 9

Chemical Method
Indophenol / Urease
Appendix
Interferences
EN
Persistant Interferences
• Concentrations above 2 mg/l urea can lead to results within the measuring range. In
this case, the water sample must be diluted with water that is free from urea and the
measurement must be repeated (plausibility test).
Removeable Interferences
• A UREA PRETREAT Tablet eliminates the interference of free chlorine up to 2 mg/l
(two tablets up to 4 mg/l, 3 tablets up to 6 mg/l).
Interference
Cl
2
Bibliography
R.J. Creno, R.E. Wenk, P. Bohling, Automated Micromeasurement of Urea Using Urease
and the Berthelot Reaction, American Journal of Clinical Pathology (1970), 54 (6), p.
828-832
including stirring rod, 10 cm
#
10
Urea T / M390
from / [mg/l]
2
EN Method Reference Book 1.0