AD&D 2nd Edition

Sphere: Divination
Range: 0
Components: V, S, M
Duration: 1 turn + 1 round/ level
Casting Time: 4
Area of Effect: Special
Saving Throw: None

This spell enables the priest to determine if an object has been poisoned or is poisonous. One object, or a 5-foot cubic mass, can be checked per round. The priest has a 5% chance per level of determining the exact type of poison.

The material component is a strip of specially blessed vellum, which turns black if poison is present.