Table 1 Hg(II) ion concentrations found in tap water samples using the standard addition method, and the recoveries and relative standard deviations (RSDs) of the Hg(II) added.
Sample | Detected (nM) | Added (nM) | Found (nM) | Recovery (%) | RSD (%) |
|---|---|---|---|---|---|
Tap water | Not detected | 50 | 48.5 | 97 | 2.3 |
Not detected | 100 | 103 | 103 | 2.2 | |
Not detected | 150 | 153 | 102 | 2.5 |