Page 16 - Pharmaceutical Analytical Chemistry III
P. 16
Sources of Systematic Error
3. Personal Error
Many measurements require personal judgements. Judgements of this
type are often subject to systematic, undirectional errors. For
EXAMPLE,
• Color blindeness, i.e., insensitivity to color changes,
• Physical handicaps,
• Misuse of measuring devices,
• -transfer of solution or incompleteppt drying
• Preconceived idea of “true” value.
Such errors can be reduced by self-discipline, experience ,and care of
the analyst in the physical manipulation.
