170135_inorganicventures_flipping

Measurement Uncertainty What is Uncertainty? • Something that is doubtful or unknown” (Merriam-Webster) • “Range of values that the analyst believes could reasonably be attributed to the measurand” (EURACHEM 2.1.3) • Random error • Systematic error • Gross error • Method validation should identify and eliminate/minimize significant errors

Sources of Uncertainty

Sampling

Preparation

Calibration

Storage • Contamination

• Homogeneous?

• Dissolution Technique • Volumetric or Gravimetric?

• Purity

• Compatibility

• Representative?

• Interferences