If pads are sealed in original glass vial within the aluminum vacuum pack – 90 days in refrigerator or 1 year in freezer.

If pads are opened and unused ones resealed in vial – 90 days in refrigerator.

Loaded sampler in bag placed in brown vial with lid – 60 days in refrigerator.

Extracted solution in water, in sealed 8 ml vial – 90 days in refrigerator.

Exposed loaded sampler, in bag placed in brown vial with lid – No refrigeration necessary as long as stored at normal room temperature, for no more than 14-21 days. The control pad must also be stored with exposed pads to detect any interference pads may accumulate during storage.

Note: Analysis should be done as soon as possible after exposure.