LaMotte Nitrate-Nitrogen Low Range Enzyme Kit - Manual (Page 3)

Stor age
The Enzyme Vials (8136) contain very small amounts of dried reagents that
may not be visible. Do not open the vials before use. The Foil Bag contains
desiccant packs. Do not remove Enzyme Vials from the Foil Bag until ready
to use.
Store this kit in a cool, dry place, preferably at room temperature or lower (a
refrigerator or freezer is best), whenever possible. Exposure to heat will cause
the enzyme to denature and become inactive. Heat will also adversely affect
the performance of the Nitrate tablets. If the
Nitrate tablets have turned a
dark brown, this is an indication that the kit contents have been exposed to
heat and the contents should be discarded.