Research Article
An Ecofriendly and Stability-Indicating HPLC Method for Determination of Permethrin Isomers: Application to Pharmaceutical Analysis
Table 1
Summary of stress degradation studies of permethrin isomers.
| Stress condition/ media/duration | Recovered trans-isomer (%) | Recovered cis-isomer (%) | Number of unknown impurities |
| Photolytic/H2O/ 254 nm/1 h | 98.69 | 98.06 | 0 | Acidic/1.0 N HCl/12 h | 68.08 | 64.57 | 4 | Neutral/H2O/80°C/12 h | 96.80 | 97.54 | 1 | Oxidative/3.0% H2O2/4 h | 88.05 | 84.76 | 0 | Basic/1.0 N NaOH/12 h | 0.00 | 0.00 | 3 |
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