Table 1. Samples, target pesticides, and evaluation period for long-term stability assessment.
| Matrix | NMIJ CRM No. | Target pesticides | Evaluation period for stability (days) |
|---|---|---|---|
| Brown rice | 7504-a | Etofenprox | 5415 |
| Fenitrothion | |||
| Soybean | 7509-a | Chlorpyrifos | 1801 |
| Diazinon | |||
| Fenitrothion | |||
| Permethrin |