The results of detection of Cr(vi) in river water (n = 3)a.
| Sample | Found (μM) | Added (μM) | Total found (μM) | Recovery (%) | RSD (%) |
|---|---|---|---|---|---|
| 1 | Not detected | 0 | Not detected | — | — |
| 2 | Not detected | 5 | 5.13 | 102.6 | 1.21 |
| 3 | Not detected | 50 | 49.68 | 99.4 | 1.67 |
| 4 | Not detected | 100 | 98.18 | 98.2 | 2.54 |
RSD: relative standard deviation.