Table 4 Uncertainty budget for gold purity determination
Sources of uncertainty | X | Unit | u std (x) | Unit | u std (x)/X | Uc (%) | U exp ;k = 2; (%) |
|---|---|---|---|---|---|---|---|
Atomic mass of Gold | 196.9665 | g | 2.31 × 10-6 | g | 1.17 × 10-8 | 0.0028 | 0.0056 |
Precision | 99.993 | % | 1.23 × 10-3 | % | 1.23 × 10-5 | ||
Mettler Toledo balance , model AX-105 | 0.20058 | g | 5.0 × 10-6 | g | 2.49 × 10-5 |