Research Article
Spectrophotometric Determination of p-Nitrophenol under ENP Interference
Table 3
The nano-Fe(OH)3 and coexisting ions interference test.
| | Reagents | Nano-Fe(OH)3 | NaHCO3 | MgSO4 | CaCl2 | KCl | MnSO4 | KNO3 |
| | Cations addition (mg/L) | 101 | 188 | 200 | 200 | 100 | 100 | 126 | | Anions addition (mg/L) | 3 | 500 | 800 | 355 | 182 | 177 | 200 | | PNP standard addition (mg/L) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | | Measured value of PNP standard addition (mg/L) | 12.46 | 12.17 | 12.43 | 12.05 | 12.22 | 12.27 | 12.50 | | Standard recovery rate (%) | 103.9 | 101.4 | 103.6 | 100.4 | 101.8 | 102.3 | 104.2 |
|
|
1The amount of nano-Fe(OH)3 added was calculated in terms of Fe.
|
