Table 2 Determination and recovery of Cr2O72− in lake and tap water
From: Label-free upconversion nanosensor for water safety monitoring of permanganate and dichromate ions
Samples | Cr2O72− added | Cr2O72− found | Cr2O72− recovery (%) | RSD (%) n = 3 |
|---|---|---|---|---|
Lake water | 10 | 9.1 | 91.0 | 3.3 |
50 | 48.3 | 96.6 | 1.6 | |
100 | 97.6 | 97.6 | 5.1 | |
500 | 530.3 | 106.1 | 3.7 | |
1000 | 979.6 | 98.0 | 0.7 | |
1500 | 1469.9 | 98.0 | 1.1 | |
Tap water | 10 | 10.3 | 103.1 | 2.5 |
50 | 51.6 | 103.3 | 4.7 | |
100 | 98.0 | 98.0 | 3.8 | |
500 | 539.1 | 107.8 | 3.1 | |
1000 | 996.4 | 99.6 | 1.7 | |
1500 | 1515.6 | 101.0 | 0.9 |