Table 4.
Stability of mint silver in conductivity water at room temperature (immersed area 60 cm2)
| Timea | True mass in a vacuum | Deviations from average mass | Rate of change in mass | |
|---|---|---|---|---|
|
| ||||
| Hours | Grams | μg | μg/hour | (μg/hr)/cm2 |
| 0 | 14.139733 | +9 | …………… | …………… |
| 4.0 | 14.139718 | −6 | −3.75 | −0.062 |
| 24.0 | 14.139723 | −1 | −0.04 | <−.001 |
| 73.0 | 14.139700 | −24 | −.45 | −.008 |
| 141.5 | 14.139718 | −6 | −.11 | −.002 |
| 332.0 | 14.139728 | +4 | −.02 | <−.001 |
| 502.5 | 14.139749 | +25 | +.03 | <+.001 |
|
| ||||
| Average ±10 | ||||
| Average mass=14.139724 g | ||||
| Standard deviation of mean=5.7 μg. | ||||
a
Time of immersion of silver in water.