fejlkilde

Noun

 * 1)  something that causes the result of an experiment to be different from the "truth", such as over- or undermeasurement, noise, factors unaccounted for in the used model, etc.
 * En fejlkilde fælles for kolorimetriske titreringer er, at de altid må afsluttes efter omslagspunktet, og aldrig før.
 * An error source common to colorimetric titrations is that they must always be finished after the colour-change point, and never before.