Formerly referred to as method FDA 221, FDA 402.E2 was developed to analyze chlorinated herbicides such as, but not limited to, 2,4-D, MCPA, and 2,4,5-TP.
| Analyte | RL | |
| 2,4 - D | 0.05 PPM | |
| 2,4 - DB | 0.05 PPM | |
| 2,4,5 - T | 0.05 PPM | |
| 2,4,5 - TP | 0.05 PPM | |
| Dicamba | 0.05 PPM | |
| Dichloroprop | 0.05 PPM | |
| Dinoseb | 0.05 PPM | |
| MCPA | 0.05 PPM | |
| MCPP | 0.05 PPM |
