From: Quantifying uncertainty in the measurement of arsenic in suspended particulate matter by Atomic Absorption Spectrometry with hydride generator
Uncertainty component
Distribution
Standard Uncertainty ± μ(x)
Calibration accuracy as per certificate; k = 2
±0.02 mL
Normal
0.02/2 = 0.01
Effect of temperature variation on 5 ml pipette
5 × *3 × 2.1 × 10-4
= 0.0032
Rectangular
0.0032/√3 = 0.0018