Page 18 - Pharmaceutical Analytical Chemistry III
P. 18
The Effect of Determinate Errors Upon Analytical Results
Determinate errors may be either constant or proportional.
Constant (Additive) Errors:
The absolute error is independent of the magnitude of the measured
quantity, thus of the size of the sample, they become more serious as
the size of the quantity measured decreases. Thus the relative error
varies. If the sample size is small, relative error is large.
Example: volume of standard solution used to cause a color change
in titration is a constant error.
