Table 3 Summary of uncertainty factor and relative expanded uncertainty for solubility and diffusivity of gas.
From: Characterization technique of gases permeation properties in polymers: H2, He, N2 and Ar gas
Uncertainty factor | Value (%) |
|---|---|
Repeated measurements | 4.2 |
1.7 | |
Volume change of specimen | 1.7 |
Calibration certificate of electronic balances | 0.001 |
Accuracy of graduated cylinder | 0.3 |
Resolution of graduated cylinder | 0.2 |
Accuracy of manometer | 0.6 |
Combined standard uncertainty, uc | 4.9 |
Coverage factor, k | 2.1 |
Expanded uncertainty, U = kuc | 10.3 |
