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Effect of temperature on colorimetric reaction.
| Temperature (°C) | Phenomena |
|---|---|
| 10 | No obvious pink insoluble substance forms within 30 s |
| 15 | Pink insoluble substance forms within 30 s |
| 20 | Pink insoluble substance forms within 30 s |
| 25 | Pink insoluble substance forms within 30 s |
