Sample | Amount of NO− 3 (mg∙L−1) | Recovery (%) | |
Added | Found | ||
Lettuce | 0.0 | | - |
5.0 | 5.4 | 108.0 | |
10.0 | 11.5 | 115.0 | |
Cauliflower | 0.0 | | - |
5.0 | 5.8 | 116.0 | |
10.0 | 11.3 | 113.0 | |
Spinach | 0.0 | | - |
5.0 | 4.7 | 94.0 | |
10.0 | 9.4 | 94.0 | |
Arugula | 0.0 | | - |
5.0 | 5.7 | 114.0 | |
10.0 | 10.8 | 108.0 |